National Library of Scotland B000355878 fz £, 14 e } V ENCYCLOPAEDIA BRITANNICA. EIGHTH EDITION. * THE UITANNICA, ILLUSTRATED BY MAPS AND NUMEROUS ENGRAVINGS ON WOOD AND STEEL. ^ PRINCIPAL CONTENTS: ENTOMOLOGY, FISHERIES, and EDWARD FORBES. By James Wilson, F.R.S.E. EPHRAEM SYRUS. By Rev. Henry Burgess, LL.D. EPISCOPACY. By Right Rev. George Gleig, D.D. ERASMUS and FEUDAL LAW. By David Irving, LL.D. EQUATIONS. By James Ivory, F.R.S. ETHNOLOGY. By R. G. Latham, M.A., M.D. ETRUSCANS, EUGENE, FENELON, &c. By James Browne, LL.D. EUROPE. By Charles Maclaren, F.R.S.E., and James Lawrie. EVIL. By Rev. W. L. Alexander, D.D. EXCHANGE, EXCHEQUER BILLS, and EXCISE. By J. R. M‘Culloch. EXTREME UNCTION, FATHERS, FEDERAL GOVERNMENT, &c. By Rev. J. Taylor, D.D. FABLE and FALLACY. By Wm. Spalding, A.M., Prof, of Logic in the Univ. of St Andrews. FALCONER, FARQUHAR, and FAIRFAX. By Robert Carruthers. FASHION. By Dr Doran, Author of “ Habits and Men,” &c. FERMANAGH. By Henry Senior. FEZZAN. Revised by Augustus Petermann. FICHTE. By John Colquhoun, F.R.S.E. FIFESHIRE and FORTH. By Thomas Barclay. FIGURE of the EARTH. By Thomas Galloway, F.R.S. FILTER. By George Buchanan, F.R.S.E. FLINTSHIRE. By John Girdwood. FLORIDA. By J. Smith Homans, New York. FLUXIONS. By William Wallace, LL.p. FONTANA, FORSTER, and FOURCROY. By Thomas Young, M.D. FOOD. By Thomas Lindley Kemp, M.D. FORFAR. By James Cowie. FORTIFICATION. By Lieut.-Col. Portlock, Woolwich. FOSTER. By J. E. Ryland, M.A. FOX, C. J. By John Allen. Evidence, Examinations, Ephesus, Epicurean Philosophy, Essex, Estremadura, Etty, Euphrates, Euripides, Exhibition, Falkland Islands, Fanaticism, Faroe Islands, Flamsteed, and Vitrified Forts. And a great variety of New Miscellaneous Matter and Extensive Improvements. LITERATURE. N. vfD ADDITIONS; NGS. Edinburgh: Adam & Charles Black. London : Simpkin, Marshall, & Co. And Sold by all Booksellers. ADAM AND CHARLES BLACK, EDINBURGH. MDCCCLV. [The Proprietors of this Work give notice that they reserve the right of Translating it.] xs’fdfl'. ■ . ■ - .1 .* . . ENCYCLOPAEDIA BRITANNICA, Oil DICTIONARY ARTS, SCIENCES, AND GENERAL LITERATURE. EIGHTH EDITION. WITH EXTENSIVE IMPROVEMENTS AND ADDITIONS; AND NUMEROUS ENGRAVINGS. VOLUME IX. ADAM AND CHAELES B^ACK, EDINBURGH. MDCCCLV. {The Proprietors of this Work give notice that they reserve the right of Translating it.} NEILL AND CO., PRINTERS, EDINBURGH, ENCYCLOPAEDIA BRITANNICA ENTOMOLOGY. Entomo- So numerous and diversified are the subjects of entomo- l°gy- logical science, that a detailed exposition of the Class In- secta is scarcely compatible with the limits usually assigned to a treatise in a compendious work, such as that with which we are now engaged. It may indeed be made to present a general, and at the same time systematic, view of the science, sufficiently ample to convey an accurate idea both of the individual character and the general relationship of groups, but it cannot fill these up in such a way as to ex¬ hibit the minuter features of their component parts, or their delicate differences or agreements in structural form, in¬ stincts, and modes of life. The chief use of such a treatise must ever be to serve as a guide or indication to the stu¬ dent regarding the sources from which he is to draw a more extended and complete accpiaintance with a subject so won¬ drous in itself, that the more it is investigated and under¬ stood, the deeper and more delightful will become the in¬ terest by which it is naturally'invested. The division of labour in natural history now implies not only the separation, as distinct departments of study, of the primary classes of the animal kingdom from each other, but also the subdivision of those classes into many minor groups, each of which by itself alone is more than sufficient to oc¬ cupy, if not exhaust, the entire attention of the most de¬ voted naturalist. It is thus that those who have sought and found distinction in the scientific field have usually, in recent years, confined their more sedulous and painstaking researches to some special department; and in entomology more particularly, from its vast extent and extraordinary diversity, great advantage has arisen from its votaries se¬ lecting certain ordinal or other groups as the subjects of exclusive study, instead of endeavouring to diffuse them¬ selves more widely and feebly over the entire expanse. But this mode of treatment, and the amplification which it admits of and requires, while beneficial to the science, have caused its branches to shoot forth and flourish so luxuriantly, that what was once a lowly shrub is now a lofty tree, the flowers or fruit of which can scarcely be gathered by any single unassisted son of Adam. Hence the difficulty of the Encyclopaedist, who has boldly to present a picture of the VOL. IX. whole, while he knows in his heart that it consists of such Entomo- an infinity of various parts as no man can number. We found the subject sufficiently trying several years ago, when the treatise here presented was composed. We find it still more burdensome and laborious now, when the divisional system just alluded to has been acted on so fully, and with such success. A recent general system of entomology can scarcely be said to exist, so independently have the ex¬ ponents of particular portions extended their researches, each widening his scope in consequence of finding himself disembarrassed from all consideration of the neighbouring fields. To give therefore a satisfying exposition of the science of insects, each great ordinal group would now re¬ quire to have assigned to it a treatise for itself. But this, as we have said, would be incompatible with the compen¬ dious character of an Encyclopaedia, and so a general sys¬ tematic view must be taken of the entire subject under the single head of Entomology. After a careful consideration of the changes which the science has recently undergone, and bearing in mind the impossibility of including an adequate account of all that has been added to the different orders during later years, we have come to the conclusion to adhere to the system of Latreille, the great French entomologist, as on the whole the most satisfactory, and certainly the most generally re¬ ceived. But that the student who desires to extend his more special researches into particular orders may be ad¬ vised regarding the best authors which treat of these, or other great subdivisions, we shall prefix to our general treatise a bibliographical introduction, which we trust may prove of service. To increase the interest and instructive¬ ness of our list, we shall add a few biographical notices, and arrange our subjects somewhat chronologically, under the names of their respective authors. An alphabetical arrangement, like an artificial system in natural history, might possibly have been advisable, as more convenient, and as admitting of direct reference to indivi¬ dual authors the titles of whose works the student seeks to know. But we think that a near approach to a chronolo¬ gical arrangement has this great advantage, that it shows, ENTOMOLOGY. 2 Biblio- as it were, the increasing strength and breadth of the great graphy. entomological stream, as it flows downwards from an early epoch towards our own days. To obviate, however, the inconvenience of a lengthened search, we shall add an alphabetical list of authors’ names, with a reference to the page and column on which the mention of their works occurs. The number even of known insects far exceeds that of the members of any other class of the animal kingdom. From the general smallness of the majority, and the extreme mi¬ nuteness of many, it may be fairly inferred that a vast amount are as yet unknown, especially in foreign countries where, for purposes of traffic, large and showy species are usually in most request. We have somewhere seen it stated that beetles were of two kinds—the black and the brown. Na¬ turalists are now acquainted with not less than 35,000 in¬ sects of that order. Above 12,000 different sorts of butter¬ flies and moths have been collected; and in Britain alone, though with somewhat of a cold and cloudy clime, we have about 2000 species of the Lepidopterous order. Several of the other great ordinal divisions contain an equal number of component members, so that the entire amount of insects now described by naturalists may be safely computed as above 72,000. If we were to devote a page a-piece to these, (and we have no desire to doubt that each deserves it), then we should require to occupy about four times the contents of the present Encyclopedia, to the entire exclusion of all other subjects, which would be inconsistent with the object of this great work. It is more than 150 years since John Ray tried to astonish the English public by boldly stating that so numerous were both beetles and butterflies in this country, that he believed the species of each kind might amount to more than 150. “ The fly kind,” he continues, “ will be found in multitude of species to equal, if not exceed, both the forementioned kinds. The creeping insects that never come to be winged, though for number they may fall short of the flying or winged, yet are they also very numerous; as, by running over the several kinds, I could easily demonstrate. Sup¬ posing, then, there be a thousand several sorts of insects in this island, and the sea near it, if the same proportion holds between the insects native of England and those of the rest of the world, as doth between plants domestic and exotic (that is, as I guess, near decuple), the species of insects in the whole earth (land and water) will amount to 10,000; and I do believe they rather exceed than fall short of this sum.” The subject, however, seems to have grown fast upon him, for at an after period he estimated the total number of British insects as possibly 2000, and those of this terra¬ queous globe at 20,000. Now, in Mr Stephens’ Catalogue of British Insects, published twenty-six years ago, we have an enumeration of 10,012 species, and numerous additions have been made during the intervening years. So far back as 1821 Mr Macleay calculated the number of the Annulosa (Insects and Crustacea) preserved in the various collections of Europe, as amounting to 100,000. It is not surprising then that entomological science should now be so frequently subdivided, and the practice followed of each order, or other great natural group, being selected by different individuals as the exclusive object of attention. NOTICES REGARDING THE PRINCIPAL AUTHORS IN ENTOMOLOGY AND THEIR WORKS. We need say nothing of the remote history of insects, as so little has been recorded of them by ancient writers. Aristotle, the earliest, and still one of the most remarkable of naturalists, appears to have separated the Crustacea as a particular group, under the title of Malacostraca, from the Entoma or other insects. These latter he subdivided into Entoma ptilota and Entoma aptera—the winged and the wingless tribes; and these again he further separated into Biblio- various minor groups, for the greater part extremely na- graphy. tural, even when viewed by the lights of modern know- ledge. Aristotle’s attainments in natural history were truly extraordinary, and many of the finest generalizations from ascertained structure are to be found in his zoological writ¬ ings. His disquisitions on a group, the Cuttle-fish, not be¬ longing to our present department, may be cited as de¬ serving of the highest praise even at the present day, and it is indeed only during recent years that modern naturalists have themselves attained a sufficient knowledge of certain truths of nature, from actual observation, to be qualified to judge of and appreciate what he knew. The works of Pliny and TElian need find no place in the library of the entomologist. So passing over a period of more than 1800 years from the days of Aristotle, we come to— Conrad Gesner, a poor but industrious Swiss, who was born in 1516, and is by many regarded as the restorer of natural history. He became a physician at Zurich, and gathered together all that was known relating to the history of animals, thus filling five large folio volumes with that of the Vertebrata alone. His posthumous papers on insects fell eventually into the hands of Thomas Mouffet, and were published by him under the title of Insectorum sive mini- morum Animalium Theatrurn. Folio, fig.; London, 1634. Gesner was one of the first, after the revival of learning, to form collections of objects in natural history, his predeces¬ sors having chiefly confined themselves to writing commen¬ taries on the ancients, not seldom rendering “confusion worse confounded,” and darkening knowledge by a multipli¬ city of vain words. He was a man of singular learning,— monstrum eruditionis, as he is termed by Boerhaave, and has been regarded by many as the greatest naturalist from the days of Aristotle up to a comparatively recent time. Ulysses Aldroyandus, also a learned and laborious compiler, was contemporary with Gesner. He was a noble¬ man of Bologna, professor in the university there, was born in 1525, and died blind in 1605. He wrote fourteen folio volumes on “ Natural History,” which Baron Cuvier has termed “ an indigested and wearisome compilation.” It is certainly not very methodical, but many parts of it may be read with amusement, if not with instruction. It was pub¬ lished chiefly by his successors. There are two editions in folio of his treatise on insects, termed De Animalihus In- sectis libri septem, Bonon., 1602 ; Frankf., 1618-23. He divides them into terrestrial and aquatic, and the orders are formed from the presence, the number, and the disposition, of the legs and wings. His groups are often arbitrary and unmeaning. He may be likened to Pliny, as one who made a collection of almost all that was known on the subjects of which he treated prior to his own time. The desirable power of discriminating truth from fiction was not, however, among his characteristics. D. J. Hcefnagel was a painter, and a man of good ob¬ servation. He left behind him very exact representations of a number of insects, which were engraved at Antwerp in 1630 and 1646, under the title of Diverse insectorum vo- latilium icones ad vivum depicte. The plates constitute its chief excellency, the letter-press being of less value. —Archetypa Insectorum. 4 vols. fob, Frankf., 1692. Thomas Mouffet, an English naturalist and physician, died about 1600. His entomological work, which is remark¬ able as the first special one on insects, is entitled Insectorum sive minimorum Animalium Theatrum. It was published by Theodore Mayerne, a Frenchman, and physician to James the First, in one volume folio, with 500 woodcuts, London, 1634. It is greatly in the style of Gesner, to whose manu¬ scripts he had access, and from which he borrowed largely. Aalborg. De Cultura Apum. Copenhagen, 1639. — Tractatus de Apibus. Hafniae, 1642. It was about this period that the celebrated Harvey 3 ENTOMOLOGY. Biblio- ventured to controvert the ancient opinion regarding the grapby. equivocal or spontaneous generation of insects ; and although his philosophical aphorism of omnia ex ovo was some time of receiving a general approval, yet his own experiments, and those more especially of Redi and Malpighi, soon afforded a firm and incontrovertible basis for the mainten¬ ance of that opinion. Joseph Warden. This old writer devoted his atten¬ tion to industrial insects, and has published, Apiarium, or a Discourse of Bees, &c., 8vo, London, 1676.—A further Discovery of Bees, treating of the Nature, Government, Generation, and Preservation of the Bees, by Mos. Rasden. 8voj fig., London, 1680.—The true Amazons, or the Mon¬ archy of Bees. 8vo, London, 1713. Francesco Redi of Arezzo, a physician, and a man of excellent literary attainments, was born in 1626, and died in 1698. His observations were first published in Italian, at Florence, in 1668, and afterwards at Amsterdam in 1671, and following years, under the title of Experimenta circa Generationem Insectorum. 3 vols. 12mo, with plates. John Goedart published a work in Dutch, which was afterwards translated into Latin: Metamorphosis et Historia Naturalis Tnsectorum. 3 vols. in 8vo, 1662-7, with plates. It contains some original facts, and the figures of the species are still recognizable. This author was a Dutch painter, and among the earliest to attend to the transformations of insects. An English edition of his work was published by Dr Martin Lyster in 4to, York, 1682. Marcellus Malpighi was the author of some excellent treatises on the anatomy of insects. His Dissertatio de Bombyce explains the structure of the silk-worm. It forms a small volume of 100 pages 4to, with twelve plates, pub¬ lished in London in 1669, and is reprinted in the second volume of his Opera Omnia, 1686. John Swammerdam, the most remarkable writer on the anatomy of insects, was a Dutch physician, born at Am¬ sterdam in 1637. He died in 1680. He published a gene¬ ral history of insects in Dutch, about the year 1669, which was translated into both French and Latin. We may here observe, that the methodical arrangement of articulated animals, from the time of Aristotle and other ancient writers, down to so late a period as the days of the great Dutch ob¬ server, was extremely simple. The principal divisions were formed in relation to the medium which they inhabit, the presence, the consistence, and the number, .of the feet and wings. But the work .of Swammerdam, republished at Leyden in 1737-8, under the title of Biblia Naturae, sive Historia Insectorum in classes certas redacta, &c., 2 vols., folio, with plates, created an epoch in the science. The great merit of this remarkable writer consists in the light which he threw upon the mysteries of metamorphoses ; and a marked character of his classification results from his having partly based it upon the nature of those transformations. Swammerdam disposes of his articulated animals under four principal orders :—The first comprehends all insects (so called) which leave the egg in a completed state, and provided with all their members ; they increase in size by degrees, and their metamorphosis consist, not in any striking transformation, but rather in a simple casting of the skin. He here places spiders, lice (of the structure of which he gives a very circumstantial account), ticks, wood-lice or slaters, entomostraca, scorpions, earth-worms, leeches, and others. His second order contains such as leave the egg with six feet, and arrive at the perfect state through the medium of nymphse, of active habits, and furnished with the rudiments of wings. They become perfect by the casting of their skin, and the great and rapid expansion of their wings. Here we have the Libellulce or dragon-flies, the Nepae or water scorpions, the Ephemerae, and other tribes, which, in the modern systems, are classed under the different orders of Neuroptera, Orthoptera, and Hemip- tera. Swammerdam’s third order is composed of such in- Biblio- sects as exhibit distinct members in the nympha state, but graPhy- are incapable in that condition of locomotion, such as the coleopterous and hymenopterous tribes ; he also here in¬ cludes such as undergo a more complete metamorphosis, for example, the lepidopterous order, of the singular and previously unexplained transformations of which he gives an admirable account, by narrating his own observations on the nettle and cabbage butterflies. His fourth order com¬ prehends those species which change into an egg-like or obtected chrysalis, and corresponds to the order Diptera of our modern systems. The work in general is of the greatest value in the study of the organization of insects, and abounds in curious facts illustrating the natural history and anatomy of animals. “ It was a great point gained in the science,” says Mr Kirby, “ to introduce the considera¬ tion of the metamorphosis, and to employ it in the extrica¬ tion of the natural system ; for though when taken by itself it will, as in the table just given, lead to an artificial arrange¬ ment, it furnishes a very useful clue when the consideration of insects in their perfect state is added.” Martin Lyster, an English naturalist, and physician to Queen Anne, died in 1711. He published in 1685 a metho¬ dical edition of Goedart, cum Scarabaeorum Anglicanorum quibusdam tabulis mutis. He was a contemporary and coadjutor of Ray, and by his various writings threw great light on many points of Entomology. His character as an entomologist, or rather as an arachnologist, was, however, chiefly established by his excellent treatise De Araneis, in which he describes the spider tribes with great accuracy. Madame Sibilla Merian, a Dutch lady of German family, was born in 1647, and died in 1717. She composed several entomological works, some of which were published posthumously. They are remarkable for the beauty of the plates; and being rare from the small number of examples thrown off, are rather sought after by the bibliographical naturalist. Their titles are, Metamorphosis Insectorum Su- rinamensis. Amstel. 1705.—Erucarum Ortus alimentum et paradoxa metamorphosis. Amstel. 1718, with fifty plates. She also wrote a history of European insects, translated into French by M. Mairet, one vol. folio, 1730. There seem to be various editions of her works, in all of which, however, the plates are the same. Antony Leuwenhoeck, a Dutch naturalist, famous for his microscopical observations, and one of the improvers of the microscope itself, was born at Delft in 1632, and died in 1723. He published a work in five small 4to volumes, entitled Arcana Naturae, ope Microscopiorum detecta. Delphis, 1695, 1721. His Select Works were published in English by Samuel Hoole, two vols. 4to, 1798. There is no arrangement in his works, the objects being described as they happened to occur; and though the style is rather tedious from the laborious minuteness of his investigations, he has thrown great light upon the history of gall-insects, ants, bees, gnats, and the larvae of the genus Tenthredo. Antonio Vallisnieri, an Italian naturalist, of a noble and ancient family, was born in 1661, and died in 1730. He was a man of learning, and an admirable observer and narrator. His first work was published at Venice in 1700, under the name of Dialoghi sopra la curiosa origine, sviluppi e coslumi di varii Insetti. His collected works form three small folio volumes, with many plates exceed¬ ingly w’ell engraved, and contain a mass of interesting in¬ formation, original at that period, and still held in estimation. John Ray, an English divine, was born in 1628, and died in 1705. He is admitted by Baron Cuvier to have been the first true methodizer of the animal kingdom, and the principal guide of Linnaeus in that department of natural science. He published his Methodus Insectorum, seu In- secta in methodum aliqualem digesta in 1705; but his larger work, the Historia Insectorum (which, as appears » 4 E N T O M Biblio¬ graphy. from his Philosophical Letters, was a kind of joint produc¬ tion of his own and Willughby’s) was published by Lister after his death. About this same period Sir Hans Sloane flourished in England. His collections formed the original nucleus of the British Museum, and he greatly contributed, by his Zealand disinterestedness, to the general extension of know¬ ledge in natural history. Eleazer Albin, an English painter, published a work under the title of Insectorum Amjlice Naturalis Historia, with notes and observations by W. Derham, London, 1731. Rene-Antoine Ferciiaultde Reaumur, born in 1683, died in 1757, was the author of one of the most important works which has ever appeared on any branch of natural history. It bears the title of Memoires pour servir a VHis- toire des Insectes, and is composed of 6 vols. in 4to, which made their appearance from 1734 to 1742. His skill and patience in the observance of the manners of insects have never been excelled, and the only objection to his incom¬ parable work is its want of systematic arrangement. It con¬ tains numerous plates. Albert Seba, an apothecary of Amsterdam, born in 1665, died in 1736, published many figures of insects in his Thesaurus, a work in 4 folio volumes, Amsterdam, 1734, 1765. The plates are good, though badly coloured. The text is of no value. The author was a zealous and success¬ ful collector of objects in natural history. Carolus Linnaeus, “ the immortal Swede,” professor at Upsal, and the great founder or reformer of the modern system and nomenclature of natural history, was born in 1707, and died in 1778. One of his many great merits consists in his having given definitions of those generic groups which his predecessors had merely distinguished by the imposition of vague names. Another noted excellence was the invention of trivial names. The older naturalists, as Mr Kirby has remarked, used to treasure in their memo¬ ries a short description of each species, by which, when they O L O G Y. desired to mention it, they made it known. For example, Biblio- in speaking of our common Lady-bird, they would call it graphy. “ the Coccinella with red coleoptera having seven black spots.” This long enunciation was first called the titulus or title, and afterwards the nomen specificum, or specific name. But as the number of species increased, it became no easy matter to remember even a few thousands of these definitions ; and, with a view to remedy that inconvenience, Linnaeus invented what is called the nomen triviale, which expresses any species by a single term added to its generic appellation, such as Coccinella, septem-punctata, for the spe¬ cies just alluded to. In his definitions he confined himself to twelve words, a whimsical restriction, which, while it avoids prolixity, would, in our now immensely swollen faunas, con¬ found the species, by rendering the same expressions appli¬ cable to several different kinds. Although his system is professedly artificial, his tact for the discovery of natural groups in general seems to have been almost intuitive. The entomological system of Linnaeus is founded on the presence or absence of the wings, their number, consistence, surface, respective position in repose, and the presence or absence of a sting. This classification, so far as the orders are concerned, has served as the basis of all that have been since promulgated ; and it underwent various modifications and improvements in the course of the numerous editions of the Systema Natures. Of these, twelve were published during the author’s lifetime. The first edition (1735) con¬ sisted of only 14 folio pages; the twelfth is in 3 vols. 8vo, 1766-68; the thirteenth was greatly enlarged by Gmelin, 7 vols. 8vo, Leipz. 1788-93. There have been numerous reprints in all countries. The English translation by Turton is in 7 vols. 8vo, Lend. 1806. The Fundamenta Erdomo- logice, by W. Curtis (1772), and the Institutions of Entomo¬ logy, by Yates (1773), are transcripts from the Systema Natures. The following table presents a view of the Entomological orders of the great Swedish naturalist. crustaceous, with a straight suture, semicrustaceous, incumbent, imbricated with scales, , . f unarmed 1 membranous. Anus j aculeate } 2, Poisers in place of the posterior pair, 0, Or without either wings or elytra, Superior All Coleoptera, 1st order. Hemiptera, 2d Lepidoptera, 3d Neuroptera, 4th ... Hymenoptera, 5th ... Diptera, 6th ... Aptera, 7th ... John Leonard Frisch, rector of the gymnasium of Berlin, was born in 1666, and died in 1743. Besides his well-known work on birds, he wrote on German entomo¬ logy, Beschreibunq von Insecten in Teutschland. 1 vol. 4to, with plates, Berlin, 1720-38. J. Dulfield. New and Complete Natural History of English Moths and Butterflies, considered through all their Progress, States, and Changes. Lond. 1748—49. B. J. v. Buckwald. Insectologies Danices Specimen. 4to, Hafn. 1760. Roesel de Rosenhof, a painter of Nuremberg, was born in 1705, and died in 1795. He was an ingenious and accurate observer, and represented subjects of natural his¬ tory with fidelity. He published an entomological work called Insecten Belustigungen, in 4 vols. 4to, with excellent coloured plates, Nuremb. 1746, et seq. Besides the beauty of the illustrations, the author enters into many interesting details relating to the structure, the manners, and the me¬ tamorphoses of insects. A supplement (forming the 5th vol.) to Roesel’s work was published by Kleeman, his son- in-law :—Beytresge zur Natur Oder Insecten geschichte. Nuremb. 1761. John Hill. A Decade of Curious Insects ; sheivn in their Natural Size, and as they appear Enlarged before the Lucernal Microscope, in which the Solar Apparatus is artificially illuminated. 4to, col. fig., Lond., 1773. Charles Bonnet, a noted philosopher and naturalist of Geneva, was born in 1720, died 1793. At twenty years of age he published an excellent Memoir on the Aphides, or pucerons, which is combined with many others in his Traite diInsectologie. His works were published in 9 vols. 4<;o, in 1779. He was an excellent observer. Jacob Admiral published a Dutch folio on butterflies : Insectes graves en maniere Noir avec VExplication des Planchesen Hollandais. Folio, fig. 1740. Itcontains twenty- five coloured plates, deservedly esteemed by naturalists. Charles de Geer, a Swedish baron, marshal of the court, and member of the Academy of Stockholm, was born in 1720, and died in 1778. His work is written in French, though published at Stockholm, in 7 vols. 4to, 1752-1778, and bears the same title as that of Reaumur {Mem. pour servir d VHistoire des Insectes'), to which it may be regarded as a sequel. The first two volumes are rare, and a general abridgment of the whole was given by Retzius in a Latin work entitled Genera et Species Insectorum, 1 vol. 4to, Lipsise, 1783. There is also a German translation, enlarged by Goez. These celebrated Memoires are very similar in their scope to those of Reaumur; but they are conducted, es¬ pecially the last five volumes, in a much more methodical manner. The first volume contains sixteen memoirs on caterpillars, and a seventeenth in which he describes their enemies the Ichneumonidae, and other foes. The second volume is divided into two parts, and is devoted to the his¬ tory of those insects which possess four naked wings ; it is 5 ENTOMOLOGY. Biblio- preceded by several general discourses on the habitations, jraphy. food, generation, and transformations of insects. The same volume contains the insects with farinaceous wings; those with membranaceous wings, the mouth without teeth or trunk, which the author distinguishes from such as, likewise possessing membranaceous wings, are provided with teeth, and are inter-distinguished by the absence or possession of a sting. In the third volume we find the history and de¬ scription of those four-winged insects of which the wings are sometimes entirely membranaceous, sometimes demi- coriaceous, and provided with a beak or sucker ; likewise of those which correspond to the orthopterous order. The fourth and fifth volumes contain the history of the coleop¬ terous tribes, classed according to the number of the articu¬ lations of the tarsi. We may here note, that these volumes appeared in 1774-5, that is, ten years after Geoffroy’s pub¬ lication, to be afterwards mentioned, to which we owe the first establishment of the characters drawn from the articu¬ lations. The sixth volume is devoted to the dipterous or two-winged insects, and to the Coccus tribe or kermes. The seventh volume contains the history of the apterous insects. The system of De Geer, which is contained in a posthumous volume published in 1778, may be regarded as intermediate between that of Linnaeus and Fabricius, be¬ cause, though based like the former upon the organs of Biblio- flight, and in its ternary groups equivalent to the Linnaean SraP Y' orders, it likewise takes into consideration the parts of the mouth, or organs of manducation, and may thus, as Mr Kirby has remarked, have been the means of suggesting to the latter the first idea of assuming the last-mentioned in¬ struments as the basis of a new method. “ But though partaking of both, it is nearer to nature than either; and had its illustrious author laid less stress upon the number and substance of the organs of flight, it would probably have been as near perfection in this respect as most that that have succeeded it. But following too strictly these characters, he has been led to place in different classes, or rather orders, insects that ought not to have been so sepa¬ rated, as in the case of the two sections of the Hemiptera and the Coccidce. In other respects, the whole of De Geer’s Memoirs are a storehouse of valuable observations, in which he has furnished many a clue for threading the labyrinth of nature, and given most complete and interest¬ ing histories of the whole economy and habits of many tribes and genera, as of the Trichoptera, Aphides, Ephe- merina, &c.” The importance attached, both actually and historically, to this celebrated system, induces us to present its principal features to the reader in the following tabular view. GENERAL CLASSES. zfl EH O a m I. Having wings. v II. Without wings. ORDERS. r I. Four wings without wing-cases. II. Two wings covered by two wing-cases. III. Two wings unco- I >. vered. J r TV. Undergoing a me- I tamorphosis. J V. Undergoing no me¬ tamorphosis. CLASSES. I. Wings covered with scales. Tongue spiral. Lepidoptera. II. Wings membranous, naked. Mouth without teeth or tongue. Tri¬ choptera, Ephemerina. III. Wings membranous, equal, reticulated. Mouth with teeth. Rest of Neuroptera. IV. Wings membranous, unequal, nervures mostly longitudinal. Mouth with teeth. A sting or borer in the female. Hymenoptera. V. Wings membranous. Tongue bent beneath the breast. Homoptera of Leach. VI. Elytra half coriaceous and half membranous, crossed. A pair of membranous wings. Tongue bent beneath the breast. Hemiptera of Leach. VII. Elytra coriaceous or semi-crustaceous, aliform. A pair of membran¬ ous wings. Mouth with teeth. Orthoptera. VIII. Elytra hard and crustaceous. A pair of membranous wings. Mouth with teeth. Coleoptera. IX. A pair of membranous wings. A pair of poisers. Mouth with a tongue, without teeth. Diptera. X. A pair of membranous wings. "No poisers, tongue, or teeth in the male. No wings, but a tongue in the breast of the female. Coccus, L. XI. No wings. Six legs. Mouth with a tongue. Aphaniptera. XII. No wings. Six legs. Head and trunk distinct. Hexapod Aptera, Termes, Psocus. XIII. No wings. Eight or ten legs. Head united to the trunk. Octopod Aptera, Arachnida, Crustacea. XIV. No wings. Fourteen legs or more. Head distinct from the trunk. Polypod Aptera, Crustacea. We shall merely add, that the two principal divisions of winged and apterous insects, divided into the fourteen orders above enumerated, comprised 1446 species, refer- rible to 100 genera. How meagre such an amount appears when compared with the extended lists of modern days! Charles Clerck, a Swedish painter, and a pupil of Linnaeus, published a 4to volume in the Swedish and La¬ tin languages, entitled Aranei Suecici descriptionibus et Jiguris illustrati, 1 757, in which the habits of spiders are well described. He was also the author of leones Insect- orum variorum, 1759-64, useful as an index to the Lepid¬ optera described by Linnaeus from the collection of Queen Frederica Ulrica. John Henry Sulzer composed a work in German on the characters of insects, Die Kennziechen der Insecten, with figures, 1 vol. 4to, Zurich, 1761. Peter Lyonnet, interpreting secretary to the united provinces, was born in 1707, and died in 1789. He was the author of the celebrated Traite Anatomique de la Chenille de Saule, 1 vol. 4to, 1762. He himself engraved the plates to the work, and both the letter-press and illus¬ trations are masterpieces in their way. They were declared by the excellent Bonnet to afford a demonstration of the existence of God. Lyonnet was a man of fine accomplish¬ ments, spoke nine languages, and was one of the greatest insect anatomists that the world ever saw. The work above named is an extraordinary example of skill and patience. There are 4061 muscles enumerated as existing in the head, body, and around the intestines of the caterpillar of the Cossus ligniperda.—a number greater by about 3532 than is known to exist in the whole human body. Dr de Haan of Leyden has published a posthumous work of the same great observer, entitled Recherches sur VAnatomic et les Metamorphoses des differentes especes d'Insectes. 4to, 1st and 2d parts, Paris, 1832. Chr. Sepp is the author of a work in Dutch, on the in¬ sects of the Low Countries, entitled Beschouwing der Wonderen Gods in de Minstgeachte Sehepzelen of Neder- landsche hisecten, 3 vols. 4to, Amsterdam, 1762, &c. This work came out originally in numbers, and perfect sets are now extremely rare. The plates, in Mr Swainson s opi¬ nion, have never been equalled, far less excelled, by the most successful efforts of modern art. J. A. Scopoli, professor of botany and chemistry at 6 E N T 0 M Biblio Pavia, born in 1723, died in 1788. He was the author, graphy. among other works, of the Entomologia Carniolica, 1 vol. 8vo, 1763. The general arrangement of Scopoli in his In- troductio ad Historiam Naturalem (Pragae, 1777) is bad; but his genera are frequently well grouped, and their cha¬ racters judiciously constructed. Not a few of them may be found in more recent systems under other names. He appears to have published an incompleted sequel of plates to the work first named. It is but little known. Geoffroy, a celebrated French physician, was the au¬ thor of the Histoire abregee des Insectes des Environs de Paris, 2 vols. with plates, 1764. It is a methodical work, and deservedly esteemed by entomologists. His divisions, deduced from the characters of the wings, accord closely with those of Linnaeus; but the Hymenoptera and Neu- roptera are included in the same order, and the Orthop- tera form only a section of the coleopterous tribes. He was the first to signalize and make use of the number of articu¬ lations of the tarsi, as we have already stated in our notice of De Geer. The Entomologia Parisiensis, 2 vols. 8vo, 1785, a youthful work of Fourcroy,tbe great French chemist, appears to be a mere abridgment of that above named. John Christian Schaeffer, a clergyman of Ratisbonne, was born in 1718, and died in 1799. He published Abhandlungen von Insec ten, 4to, Regenst. 1769-79; and likewise a large collection of plates of the insects of his own neighbourhood,—leones Insectorum circa Ratisbonam Indigenorum, 3 vols. 4to, Regenst. 1766-79. The designa¬ tions are those of Linnaeus. The work is well executed, and presents a careful development of the most important characters. He at the same time published a separate volume under the title Element's Entomologica, likewise with coloured plates, 35 in number. To these he added a supplement in 1777. Although the names of his classes are different, yet the classes themselves coincide with those of Geoffrey. There is a later edition of the leones, with Systematic Index by Panzer : Erlang. 1804. O. F. Muller, among numerous noted works in other departments of natural history, published a Fauna Insect¬ orum Fredrichsdalina. Hafniae, 1764. Martin Thomas Brunnich, a Danish naturalist, and professor at Copenhagen, was the author of Prodromus In- sectologice Zicellandicce, 8vo, Hafniae, 1761, and of Entomo¬ logia, sistens insectorum tabulas systematicas, Hafniae, 1764. The latter work contains plates in outline, representing the characteristic part of insects. In a short introduction he also presents a view of the structure of insects, and then furnishes us with a classification, not only of the insects themselves, but of entomologists, or Insectistce, as he is pleased to call them. The reader may perhaps like to see his arrangement of these people. It is as follows :— I. Entomologists. A. Collectors : 1°, Ancients or Fathers (Patres), such as Aristotle, Pliny, Dioscorides; 2°, Commentators, the same ; 3°, Ichniographers or figur- ists, such as Goedart, Hoefnagel, Merian, Vallisnieri, Al- bin, Frisch; 4°, Metamorphosists, such as Swammerdam; 5°, Describers, such as Ray and Linnaeus ; 6°, Monogra- phists, such as Lister, Schceffer, and Clerk ; 7°, Curiosi, such as Catesby, Strom, Pontoppidan; 8°, Museographists, such as Linnaeus and Poda; 9°, Topographers, such as Albin and Frisch; 10°, Voyagers, such as Marcgrave, Rumphius, Sloane, Hasselquist, and Osbeck.—B. Metho¬ dists : divided into, 1°, Philosophers, such as Swammer¬ dam, Reaumur, De Geer, and Linnaeus; 2°, Systematists, the same ; 3°, Nomenelators. II. Entomophilists. 1°, Anatomists, such as Malpighi, Swammerdam, Leuwenhoeck, Lyonnet, &c.; 2°, Physi¬ cians, such as Dioscorides, Galen, Aldrovandus, Mathio- lus, Glauber, Dale, &c.; 3°, Miscellanei, such as Bochart, Desser, Lerham, &c. Then follow the systematic and analytical tables which 0 L O G Y. lead to the determination of the genera and sub-genera, Biblio by the successive and compared examination of the various graphlBi parts of the bodies of insects. We had the pleasure to meet Mr Brunnich in Copenhagen, a considerable number p of years ago, and were interested in seeing the earliest author, if not the oldest man, among living naturalists. J. E. Voet.—Catalogue raisonne ou systematique du genre des Insectes qiion appelle Coleoptrees, 4to, Haye, 1766.—leones Insectorum Coleopterorum Synopsis, Obser- vationibus Commentarioque perpetuo illustravit D. W. F. Panzer, 4to, Erlangae, 1794. The plates are characteristic of the species,—the letter-press is of little value. J. R. Forster, born at Dirchaw in Polish Prussia, died in 1798, was the companion of our great circumnavigator Cook. In our present department he published Novce spe¬ cies Insectorum Centuria, 1 vol. 8vo, Lond. 1771 ;—and a Catalogue of British Insects, 8vo, Warrington, 1770. W. Curtis.—Fundamenta Entomologies, or an Intro¬ duction to the Knowledge of Insects, 8vo, Lond. 1772.—In¬ structions for Collecting and Preserving Insects, Ibid. 1772. A short History of the Brown- Tail Moth, fyc., 4to, Ibid. 1782. Benjamin Wilkes.— The English Moths and Butter¬ flies, together with the Plants, Flowers, and Fruits, whereon they Feed, Sfc.,4to, fig., Lond. 1747-60.—One hundred and twenty copperplates of English Moths and Butterflies. 4 to, Lond. 1773. Thomas P. Yates.—Institutions of Entomology, fyc., 8vo, Lond. 1773. Peter Simon Pallas, one of the greatest zoologists of modern times, was born at Berlin in 1741, and died in 1812. He was a copious writer, but his only entomological work with which we are acquainted is the leones Insectorum, preesertim Rossice Sibericeque peculiarum, published in a small 4to volume at Erlangen in 1781. He spent most of his life under the patronage of the Russian government. D. Drury, an English goldsmith, collected a fine cabinet of insects, and published a work in 3 vols. 4to, entitled Illustrations of Natural History, 1770-82. It has scarcely been surpassed in beauty, and accuracy of execution, even by the more sumptuous efforts of the present day. The figures are by Moses Harris. There is a new edition with notes by Mr Westwood, Lond. 1837. Marie Dominique Joseph Engramelle, an Augustine friar of Paris, was born in 1727, and died in 1780. He is known as the author of the descriptive portion of a noted work,—Collection des Chenilles, Crysalides, et Papillons, qui se trouvent en Europe, peints d'apres nature, 8 vols. 4to, and Suppl., Paris, 1779-93. The text is held in no great estimation, but the plates are faithful, and generally repre¬ sent the species in their various states. They were exe¬ cuted after drawings by Ernst, an artisan of Strasburg, who possessed an extraordinary and self-acquired talent for the representation of lepidopterous insects. Peter Cramer, a merchant of Amsterdam, was the au¬ thor of another magnificent work on Lepidoptera, entitled Papillons exotiques des trois parties du Monde, VAsie, VAfrique, et VAmerique. It is written in Dutch and French, consists of 4 vols. 4to, and contains 400 coloured plates. Dated from 1779 to 1782. There is a supplementary vo¬ lume to the above by Casper Stoll, a Dutch physician. It was published at Amsterdam (in Dutch and French) in 1 vol. 4to, 1790 et seq., and contains many interesting repre¬ sentations of insects in their larva and pupa states. In exe¬ cution these works are inferior to those of Harris, but they are nevertheless highly esteemed by amateurs of books in natural history. John Christian Fabricius, a pupil of Linnaeus, and professor of natural history and rural economy at Kiel, in Holstein, was born at Tundern, in the duchy of Sleswick, in 1742, and died in 1807. He was one of the greatest entomologists of modern times, and published numerous E N T O M Biblio- systematic works on insects. The important influence jraphy. which his writings exercised on the science renders it de- sirable that we should present an account, however brief, of his performances, and of the principles on which they were conceived and executed. The entomological system of Fabricius is founded on the number, proportion, form, and situation of the parts which constitute the mouth of insects, and is hence not unfre- quently known under the name of the cibarian or maxillary system. His intention appears to have been to effect for entomology wbat his great master had done for botany, by erecting his system upon a fixed and restricted foundation ; and as Linnaeus had assumed the fructification of plants for his botanical basis, so the entomologist of Kiel, perceiving no doubt how important was the employment of the teeth and jaws in the classification of the vertebrated tribes, deter¬ mined to make use of the analogous organs, so much more varied and numerous in the insect world. De Geer had previously employed the parts of the mouth, in addition to the organs of flight; but Fabricius follow'ed out the system both more minutely and with greater extension, and adopted the trophi, or parts of the mouth, as the sole support of his superstructure. “ Though nothing,” observes Mr Kirby, “ seems to have been farther from his intention than to fol¬ low Nature, since he complains that Linne, by following her too closely, had lost the Ariadnean thread of system, yet it is singular that, by building upon this seemingly narrow foundation, he has furnished a clue, by the due use of which, instead of deserting her, his successors have been enabled with more certainty to extricate her groups ; since the parts in question, being intimately connected with the functions and economy of these animals, where they differ materially, indicate a corresponding difference in their character and station.” The foundations of this new system were first exhibited in his Systerna Entomologice, sistens Insectorum classes, ordines, genera, et species, 1 vol. 8vo, 1775. In the ensu¬ ing year he published his Genera Insectorum, and his Phi- losophia, Entomologica appeared in 1778. In 1781 he put forth his Species Insectorum, in 2 vols. 8vo ; and to these, at an after period, was added a kind of supplement, with the title of Mantissa Insectorum, sistens eorum species nuper detectas, likewise in two 8vo volumes. From 1792 to 1796 he published the same works, remodelled and amended, under the name of Entomologia systematica emendata et aucta, 4 vols. 8vo; and to these a supplementary volume was added in 1798. His systems of the different orders, or classes, as he has chosen to name the primary groups, then made their appearance, each in a separate form, according to the following titles and dates: Systema Eleutheratorum (Coleoptera), 2 vols. 8vo, 1801; Systema Rhyngotorum (Hemiptera), 1 vol. 8vo, same year; Systema Piezatorum (Hymenoptera), 1 vol. 8vo, 1804; Systema Antliatorum (Diptera), 1 vol. 8vo, 1805. The Systema Glossatorum (Lepidoptera) was on the eve of publication when the author was removed from his accustomed sphere of action, and called to that tribunal which awaits entomologists in com¬ mon with other men. Illiger has given us an extract from it in his Magazin fur Insectenkunde, and the English reader will find it exhibited in the Philosophical Magazine and Annals for February 1830. The publication of so great a number of w'orks proves the devoted constancy of the author, and his unweared desire to perfect his favourite department of science. E. J. C. Esper, professor at Erlangen, published, from 1777 to 1807, a great work on the Lepidoptera of Europe, under the name of Europdischen Schmetterlinge, 5 vols. 4to, of which the first and fourth are divided into two. The figures are exact and well coloured, and although the publi¬ cation was never brought to a conclusion, it is highly prized by naturalists, even in its incompleted state. He is likewise O L O G Y. 7 the author of Pie Auslandischen Schmetterlinge, 4to, fig. Biblio- col. Erlang. 1785-98. (Reprinted, Erlang. 1830-34.) graphy.^ Caspar Stoll, formerly mentioned as the author of a Supplement to Cramer’s Papillons Exotiques, also published some excellent figures of hemipterous and orthopterous species. His Representation exactment coloriee d'apres Nature, des Spectres, des Mantes, des Sauterelles, &c. con¬ sists of eight numbers 4to (Dutch and French), 1787, et seq. There are ten numbers of his other work, entitled Representation exactment coloriee d’apres Nature, des Ci- gales et des Punaises, 4to, fig. Amsterd. 1780-83. These two works are of great value, on account of the figures of the very singular tribes of which they treat; but the letter- press is defective in point of observation, and faulty in its synonyms. Moses Harris, an English painter, and naturalist of the old school, is known as the author of An Exposition of English Insects, in English and French, 1 vol. 4to, with coloured figures, London, 1781. He also wrote The Au- relian, or Natural History of English Insects, namely, Moths and Butterflies, folio, Lond. 1778; and was the au¬ thor of an earlier and more portable volume, entitled The English Lepidoptera, or the Aureliarls Pocket Companion, 8vo, Lond. 1775. Harris was a first-rate entomological artist. F. de P. Schrank, a Bavarian naturalist, born in 1747, professor at Ingoldstadt, published, under the unassuming title of a catalogue of Austrian insects, Enumeratio Insec¬ torum Austrice Indigenorum, a large octavo volume, in 1781. This work is remarkable for a careful synonymy, and the exactness of its descriptions. The Lepidoptera are intentionally omitted, that order having been taken up, over the same territory, by Schrank’s compatriot Schiffer- miiller. I. N. de Laicharting, professor at Inspruck, born in 1747, wrote upon the insects of Tyrol, Verzeichniss der Tyrolen Insecten. 2 vols. 8vo, with plates, Zurich, 1781-4. It appears to contain only Coleoptera. Dominique Cyrillo, a Neapolitan physician, unfortu¬ nately executed for a misdemeanour in 1796, was the author of a vrork in 1 vol. folio, with coloured plates, entitled En¬ tomologies Neapolitance specimen. 1787. Vincent Petagna, another Neapolitan, composed a work on the Elements of Zoology. 2 vols. 8vo. He also wrote Specimen Insectorum Ulterioris Calabrice. 4to, Frankfort, 1787. Schiffermuller. Ankundigung eines Systematischen Werhes von den Schmetterlinge der Wiener Gegend. 4to, Wien, 1775. J. A. Ben. Bergstrasser. Entomologia Erxlebiana Scholarum in mum concinnata. 8vo, Hanau, 1776.— Nomenclatur u. Beschreib. der Insekten in der Grafschaft Hanau-Milnzenborg, fyc. 4to, fig. Ibid., 1778, 8vo.— leones Papilionum diurnorum quotquot adhuc in Europd occur runt, descriptce, &c. 4to, Ibid., 1779—81. James Barbut. The Genera Insectorum of Linncem, exemplified by various Specimens of English Insects. 4to, fig. col. Lond. 1781. Chari.es de Villiers. Les Insectes de France decrits et classes selon la Methode de Linncem, dessines par Geni- chon, et graves par les plus celebres Artistes. 4 vol. 4to, Lyon, 1781-83.—Nomenclator iconum Entomologice Lin- neance. Fol.—Linncei Entomologia, Speciebus nupernme detectis locupletata. 4 vols. 8vo, Lugd., 1787. —C. Linncei Entomologia Faunce Suecicce descriptione aucta. 4 vols. 8vo, Lugd., 1789. G. Fr. Ahrens. Verzeichniss einiger Schmetterlinge, &c Halle, 1783. C. G. Jablonsky. Natursystem oiler bekansiten in- und Amlandischen Insekten, &c. 8vo. Berlin, 1783-1806. Gabr. Bondsuorff. Historia Naturalis Curculionum E N T O M Biblio- Sueci(B. 4to, fig. Upsal, 1785. We owe to this author graphy. vari0us dissertations on the senses and physiology of in- sects. . . A. F. Fourcroy. Entomologia Parisiensis, sive Cata- logus Insectorum qua in agro Parisiensi reperiuntur. 2 vols. 8vo, Paris, 1785. N. Amoreux. Notice sur les Insectes de la France reputes venimeux. 8vo, Paris, 1789. John Charles Roemer is the compiler of Genera In¬ sectorum Linncei et Fabricii iconibus illustrata. 1 vol. 4to, 1789. This is chiefly a revised edition of Sulzer’s Ken- zeichen der Insecten, with some additional plates. NiC. J. Brahm. Handbuch der okonomischen Insecten- geschichte, in Form eines Kalenders bearbeitet. 2 vols. 8vo, Mainz, 1791. — Versuch einer Fauna Entomologica der Gegend. um Mainz. 8vo, Giesen, 1793. Spir. Giorno. Calendario Entomologica. 8vo, 1 orino, 1791.—Memoria Entomologica, See. 8vo, Ibid., 1791. Th. Martin. The English Entomologist, exhibiting all the Coleopterous hisects found in England, including upioards of 500 species, arranged, &c. 4to, Lend., 1 /92. —Psi/che ; Fiqures of nondescript Lepidopterous Insects. 4to, Ibid., 1793. E. J. C. Esper. Magazin der neuen auslandischen In- sekten. Erlang., 1794.—Die auslandischen Schmetterlinge. 4to. fig. 1785-98. Fr. Weber. Nomenclatur Entomologicus secundum Fabricii Systerna. 8vo, Hamb., 1795.— Observationes Entomologicce. 8vo, Kilise, 1795—1801. John Francillon. Description of a rare Scarabaus from Potosi, fyc. 4to, fig. Lond., \ 795.—Catalogue of the Collection of Foreign Insects. 8vo, Lond., 1818. J. G. Kugellan, und J. K. W. Illiger. Verzeichniss der Kafer Preussens, &jc. 8vo, Halle, 1798. Carl Peter Thunberg, a noted naturalist and traveller, has contributed greatly to our knowledge of northern in¬ sects, and of many others. He was a favourite disciple of Linnaeus, and evinced a strong predilection for the study of nature at an early age. He was the son of a Swedish clergy¬ man, and obtained pecuniary assistance from his friends to enable him to proceed upon his travels. After visiting France and Holland, he journeyed to the Cape, Ceylon, Java, and Japan, and brought back from those far countries many new and rare forms both of plants and insects. On returning to tthe land of his nativity he became professor at Upsal, was made a knight of the order of Vasa, and enjoyed his honours to a very advanced age. We shall name a few of his works. Many of his papers are in the Memoires of the Academy of St Petersburg, and in the Acts of the Society of Upsal. Dissertatio Entomologica, novas Insectorum species sistens. 4to, fig. Ups., 1782—91. —Dissertatio Entomologica, sistens Insecta Suecia. 4to, Ups., 1784-95.—Characteres Generum Insectorum. 4to, Ups., 1789, 12mo, Gott., 1791.—Descriptiones Insectorum Suecicorum. 5 vols. 4to, fig. Ups. 1792. Pietro Rossi, an Italian naturalist, professor at Pisa, composed the Fauna Etrusca, sistens Insecta quae in Pro- vinciis Florentina et Pisana preesertim collegit Petrus Rossius, &c., 2 vols. in 4to, with coloured plates, Liburn. 1790;—also Mantissa Insectorum, exhibens species nuper in Etruria collectas a Petro Rossio, &c. 2 vols. 4to, with coloured plates. Pisa, 1792-1794. Antoine Guillaume Olivier, member of the Academy of Sciences, professor of zoology at the veterinary school of Alfort, was born at Draguignan in 1756, and died in 1814. Besides his Voyage dans VEmpire Ottoman, VEgypte, et la Perse, 3 vols. 4to, 1807, he wrote two important works on entomology :—ls£, The subject Insectes, of the Ency¬ clopedic Methodique, 4 vols. 4to. In this voluminous article he follows the principles of the Linnaean classification, with certain modifications from the works of Geoffrey, Schceffer, o L o G Y. and De Geer. He draws his primary characters from the number and consistence of the wings and elytra, and he then makes use of the wings, along with the parts of the mouth and the articulations of the tarsi, for his secondary subdivisions. The following is his nomenclature and ar¬ rangement of the orders:—Lepidoptera, Neuroptera, Hy- menoptera, Hemiptera, Orthoptera (this is his own deno¬ mination, now generally received, and substituted by Olivier for the term Dermaptera used by De Geer), Coleoptera, Diptera, and Aptera. Each of these orders is divided into many sections. In the last-named order are comprehended all those insects of which the mouth is variable, but which have no wings in either sex. Of these some have six feet (pediculi), others eight (spiders)—while many (such as crabs and Julidae) have a still greater number. We may here note, in regard to the entomological portion of the Encyclopedie Methodique, that several other authors have contributed to its later volumes. Of these we may name more particularly MM. Adolphe Brongniart, Latreille, Lepel- letier de St Fargeau, De Serville, Desmarets, and Godard. 2d, The other great work of Olivier is the Histoire Natu- relle des Coleopteres, in six large 4to volumes, containing 363 coloured plates, and 3162 historical and descriptive pages. It appeared at intervals from 1789 to 1808. It is a work of authority, ably executed, and professes to describe and figure all the known species of the period. Vast addi¬ tions have been made to entomology since the time of its conclusion, but it still presents the largest collection of coloured representations of the coleopterous order which we yet possess. In the later portions, the number of species in certain genera having greatly increased, the author was obliged to depart from his original plan of including all the known kinds. This is chiefly perceptible in the great fa¬ milies of Curculionidce and Chrysomelidce. John Daniel Preysler wrote Werzeichniss Boehmis- cher Insecten. 1 vol. 4to, Prag. 1790. John Berkenhout, M.D., in his Synopsis of the Natural History of Great Britain and Ireland, 2 vols. 8vo, Lond. 1795, enumerates our native insects. William Lewin, F.L. S. was the author of The Papil- lios of Great Britain systematically arranged, and painted from Nature. 1 vol. 4to, Lond. 1795.—A Natural History of the Lepidopterous Insects of New South Wales. 4to, col. fig. Lond., 1805. David Henry Hoppe, an apothecary of Ratisbon, was the author of Enumeratio Insectorum elytratorum indi- genorum, with coloured plates, Erlangse, 1795,—a work with which we are not acquainted, but which is said to be a useful auxiliary in the study of the genus Donacia. He also published Insecta Coleoptera, quee in itineri- bus suis preesertim Alpinis collegerunt. Nov. Act. Nat. Cur. xii. p. 479. The latter work is in conjunction with Dr Hornschuch. John Abbot. The Natural History of the rarer Lepi¬ dopterous Insects of Georgia, collected from the Drawings and Observations of Mr John Abbot. 2 vols. fob, Lond., 1797. This work was brought out by Sir James Edward Smith, the great Linnaean botanist. The plates are by Moses Harris, and are characterized by Mr Swainson as the last and best of that artist’s performance. Leonard de Prunner is the author of Lepidoptera Pedemontana. 1 vol. 8vo, Turin, 1798. Antoine Jean Coquebert, a naturalist established at Rheims, besides various notices in the Bulletin des Sciences, is known as the author of Illustratio iconographica Insec¬ torum quee in Museeis Parisinis observavit, J. Chr. Fabri- cius. 3 decad. in 4to, Paris, 1799-1804. Christian Creutzer published Entomological Essays, in German {Entomologische versuche), 8vo, with coloured figures, Vienna, 1799. Pierre-Andre Latreille, of the Royal Academy of Bibli. graph 9 ENTOMOLOGY. Biblio- Sciences, &c., vras born at Brives in 1 762, and died in 1833. graphy. The importance attached to the numerous productions of' this “ Prince of Entomologists,” as he is called by Comte Dejean, inclines us to present the reader with a short histo¬ rical sketch of the principles and progressive improvement of his system, in combination with our chronological notice of his various volumes. Latreille’s first work was published at Brives in 1796, under the title of Precis des characteres generiques des In- sectes, disposes dans un order naturel, 1 vol. 8vo. He there divides the insecta of Linnaeus into fourteen classes, of which the first seven comprehend such as are winged, and are ranged in the following orders : Coleoptera, Orthop- tera, Hemiptera, Neuroptera, Hymenoptera, Lepidoptera, and Diptera. The other seven classes are apterous, or without wings, and are named and characterized as follows : 1°, Les Suceurs, Suctoria (Ilhyngota of Fabricius),—head distinct, antenniferous, trunk articulated, inclosing a sucker of two bristles; two scales at the base; six feet: 2°, Les Thysanoures, Thysanoura (Synistata of Fab.),—head dis¬ tinct, antenniferous; mouth furnished with mandibles, a pair of maxillae, an upper and an under lip, and antennulae (palpi); six feet;—here are ranged Lepisma, Forbicina, andPodura: 3°, Les Parasites, (Antliata, Fab.),— head distinct, antenniferous; a very short tube inclosing a sucker; in some a slight appearance of mandibles or maxil¬ lae ; six feet;—Ricinus and Pediculus : 4°, Les Acephales, Acephala (Unogata et Antliata of Fab.),—organs of the mouth appearing to replace the head; no antennae; from six to eight feet (this is the class since distinguished by the name of Arachnides, and already discussed under that title in this Encyclopaedia): 5°, Les Entomostraces, Entomos- traca of Muller (Synistata et Agonata, Fab.),—head con¬ founded with the body, which is inclined under a covering of one or two pieces; antennae frequently branched, mandibles without antennulae ; two ranges at most of maxillary leaflets ; no under lip ; generally from six to eight feet;—Monocu- lus, Cypris, Cytherea, Daphnia, Argulus, Limulus, &c.: 6°, Les Crustaces, Crustacea (Agonata, Fab.),—head con¬ founded with the body, which is usually inclosed beneath a carapace ; four antennae ; many ranges of maxillary leaf¬ lets, of which two are inserted and couched upon the man¬ dibles ; no lips; generally ten feet: 7°, Les Myriapodes, Myriapoda (Synistata, Mitosata, Unogata, Fab.),—head distinct from the body, antenniferous; mandibles with a conical advancement at their base ; scaly teeth implanted on the contour of the extremity ; two rows of maxillae at most; an under lip; fourteen feet, or more;—Asellus, Cyamus, Oniscus, Julus, Scolopendra. Latreille’s next publication w7as the Histoire generate et particuliere des Crustaces et des Insectes, 14vols. 8vo, with figures, 1802-5. It. forms a portion of the edition of Buf- fon’s works published by Sonnini. His Genera Crusta- ceorum et Insectorum, 4 vols. 8vo, was published in 1806-7, and contains a further, and certainly very skilful develop¬ ment of what he regarded as a natural system. In 1810 appeared his Considerations generates sur Vordre naturel des animaux composant les classes des Crustaces, des Arach¬ nides, et des Insectes, avec un tableau methodique de leurs genres distribues en families, 1 vol. in 8vo. It may be re¬ garded as a review of his last-mentioned work, of the ma¬ terial parts of which it proposes few alterations,—but the groups are fewer in number, and are sometimes founded on more rigorous characters. We shall here give a brief ab¬ stract of his classification at this time. The Linnsean class Insecta is divided into three distinct classes—Crustacea, Arachnides, and Insects properly so called. It is of course with the latter only that we are now concerned. He divides them into eight orders—Coleoptera, Orthoptera, Hemiptera, Neuroptera, Hymenoptera, Lepidoptera, Dip¬ tera, and Suctoria. VOL. IX. ls£, The Coleoptera are divided into five sections: 1. Pentamera, including nineteen families, viz. Cicindeletse, Carabici, Hydrocanthari, Gyrinites, Sternoxi. Malacodermi, Clerii, Necrophagi, Staphylinii, Palpatores, Ptiniores, Der- mestini, Byrrhii, Hydrophilii, Sphseridiota, Coprophagi, Geotrupini, Scarabaeides, and Lucanides : 2. Heteromera, including six families, viz. Pimeliarioe, Tenebrionites, Py- rochroides, Mordellonae, Cantharidiae, and GEdemeritae: 3. Tetramera, including ten families, viz. Bruchelae, Curculio- nites, Bostrichini, Paussili, Xylophagi, Cucujupes, Ceram- bycini, Criocerides, Chrysomelinae, and Erotylenae : 4. Tri- mera, including the family of Coccinellidae: 5. Dimera, including that of the Pselaphii. 2d, The order Orthoptera contains six families, viz. Forficulariae, Blattariae, Mantides, Gryllides, Locustariae, and Acrydii. Zd, The order Hemiptera is composed of two sections : 1. Heteroptera, containing the three families, Corisiae, Ci- micides, and Hydrocorisae: 2. Homoptera, containing the four families of Cicadariae, Psillidae, Aphidii, and Gallin- secta. Ath, The order Neuroptera is likewise bisected: 1. Subulicornes, consisting of two families, Libellulinae, Ephe- merinae : 2. Filicornes, consisting of nine families, Panor- patae, Myrmeleonides, Hemerobini, Megaloptera, Raphi- tlinae, Termitinae, Psoquillae, Perlariae, and Phryganites. bth, The order Hymenoptera also forms two sections : 1. Terebrantia, including eight families, viz. Tenthredi- netae, Urocerata, Evaniales, Ichneumonides, Diplolepariae, Cynipsera, Proctotrupii, and Chrysidides : 2. Aculeata, including thirteen families, viz. Formicariae, Mutillariae, Scolietae, Sapygitae, Pompilii, Sphegimae, Bembecides, Lar- ratse, Crabronites, Vespiariae, Masarides, Andrenetae, and Apiariae. 6^/i, The order Lepidoptera is divided into three sec¬ tions: 1. Diurna, composed of two families, Papilionides and Hesperides : 2. Crepuscularia, also composed of two families, Sphingides and Zygenides : 3. Nocturna, com¬ posed of eight families, Bombycites, Noctuo-bombycites, Teneites, Noctuaelites, Phalaenites, Pyralites, Crambites, and Pterophorites. 7M, The order Diptera comprises three sections: 1. Proboscidea, consisting of fourteen families, Tipulariae, Stratiomydae, Tabani, Rhagionides, Dolichopodes, Mydasii, Asilici, Empides, Anthracii, Bombyliarii, Inflata, Syrphiae, Conopsariae, Muscides: 2. Eproboscidea, containing the family Coriacea: 3. Pthiromyice, including merely the genus Nycteribia. Zth, The order Suctoria is formed entirely by the genus Pulex. In the year 1817 the Regne Animal distribue d’apres son organisation, See. was published by Baron Cuvier, in 4 vols. 8vo. Of that signal work the entomological portion, form¬ ing volume third, was contributed by M. Latreille. In ad¬ dition to the preceding works, he had also at different times contributed a great proportion of the articles on entomo¬ logy in the first and second editions of the Nouveau Dic- tioyinaire d'Histoire Naturelle. One of his earlier works is entitled Essais sur VHistoire des Fourmis de la France, Brives, 1798. He was likewise the author of many papers in the Annales du Museum, the Encyclopedic Methodique, and in the Dictionnaire Classique d*Histoire Naturelle, as well as of a separate volume of papers (chiefly, however, extracted from his previous labours in the Ann du Mus.) entitled Memoires sur divers sujets de VHistoire Naturelle des Insectes, &c. &c., 8vo, 1819. In 1825 he published his Families Naturelles du Regne Animal, which contains a compendious summary of zoological classification, and an arrangement of the insect tribes. In 1829 he gave to the world his completed views on entomological arrangement in the third and fourth volumes of the second edition of the R Biblio- graphy. 10 ENTOMOLOGY. Biblio¬ graphy. Hegne Animal of Cuvier. As it is by this final exposition that we are chiefly guided in the systematic portion of the ensuing treatise, we need not here enter into further details. Before proceeding, however, with our catalogue of authors, we may remark that an excellent, and, we believe, novel feature in the system of Latreille consists in the bestowal of family names upon the groups of genera. The modern families correspond in numerous instances to the old and undivided genera of Linnaeus; and when, in the progress of improvement, and the great increase in the number and nature of species, it became necessary to subdivide these genera into others of a less comprehensive charac¬ ter, the retention of the old generic name with a different termination, and its application as a comprehensive term to all the cognate genera, was an ingenious and useful device. The practice, indeed, was previously well known in other departments of natural history, but it does not appear to have been properly applied to entomology prior to the example of Latreille. There is a want of uniformity, how¬ ever, in the nomenclature of his families, so that, unless his work is kept in hand, we cannot ascertain from the name of a group whether it signifies an actual family, or some other sectional division. To remedy this defect, Mr Mac- leay, in his Horce Entomologicce, follows the suggestion of Mr Kirby, and designates his family groups by the patro¬ nymic termination in idee, which, though not classically cor¬ rect when the primitive has a feminine termination, is pre¬ ferable to any other plan, both for uniformity’s sake, and euphonice gratia. The latest works by M. Latreille with which we are acquainted are his Cours d’Entomologie, an uncompleted publication, in one volume 8vo, 1831, and his Discours a La Societe Entomologique de France, 8vo, Paris, 1832. George Wolfgang Francis Panzer of Nuremberg, born in 1755, is the author of several excellent works on Entomology, of which the earliest is the most important. It is called Deutschlands Insekten, or Faunce Insectorum Ger- manice initia, and has continued to be published at intervals between the years 1793 and 1841. It is composed of nu¬ merous cahiers, or small collections of unstitched leaves, each of which corresponds to a coloured plate of an insect, of which it bears the description. According to this plan, the figures and letter-press may be arranged according to any system preferred by the possessor of the work. Each fasciculus contains the figures and descriptions of twenty- four species of insects ; and as the fasciculi (continued since the 110th, by G. A. W. Herrich-Schaffer) now amount to 190, the total number represented and described is great. It is consequently one of the most extensive collections which we possess in this branch of science; and as the plates are extremely correct, and the synonyms carefully selected, it may be regarded as a publication of the highest value of its kind. “ The figures are drawn and etched by the famous Sturm, the best entomological artist on the Con¬ tinent, and are simply but accurately coloured,—while the v descriptions, although frequently too short, are written by the hand of a master.” (Swainson.) Panzer has published several other works on insects.—Novce Insectorum species. Sec., Norimb., 1790.—Faunce Insectorum America borealis Prodromus, 4to, Norimb., 1794.—Kritische Revision der Insektenfauna Deutschlands. 8vo, Niirnb., 1805-7.—Fn- tomologischen versuch iiber die Jurineschen Gattungen der Linneischen Hymenoptern. 1 vol. in 12mo, 1806.—Index Fntomologicus,pars prima, Eleutherata, same form, 1813. This author has confined himself to the description of the external aspect of insects, and does not appear to have de¬ voted himself at any time to the observance of manners, or the examination of internal structure. Non omnia possumus omnes. Augustus William Knock, a professor at Brunswick, formed a collection of insects, which now composes a por¬ tion of the Royal Museum of Berlin. He is author of JSteue beytreege zur Insectenkunde. 1 vol. in 8vo, with figures, Leipsic, 1801. James Henry Laspeyres, a municipal officer of Berlin, composed a work entitled Sesice Europece iconibus et de- scriptionibus illustratce. 1 vol. 4to, 1801. He is likewise the author of Critical Observations on the Systematic Ca¬ talogue of the Lepidoptera of the environs of Vienna, in¬ serted in Illiger’s Magazin. Jacques Sturm was an entomological artist of repute, and an excellent observer of insects. We owe to him the following works:—Insecten-kabinet, 12mo, Niirnb., 1791—92. — Verzeichniss meiner Insecten-Samlung, oder Entomologi- sches Handbuchfur Liebhaber u. Sammler. 8vo, fig. Nurnb., 1800.—Abbildungenzu llligers Uebersetzung, von Olivier’s Entomologie, oder ISuturgeschichte der Insecten. 2 vols. 4to, N urnb., 1802-3.—Entomologische IIefte,enthaltend Beitrdge zur weitern Kenntniss und Aufkldrung der Insehtenges- chichte. 2 vols. 8vo, fig. Frankfort, 1803.—Catalog meiner Insecten Samlung. I. Th. Kafar, 8vo, fig. col. Nurnb., 1825. —Anophthalmus (BlindlaufEifer) neue Gatlung aus der Familie du Caraben. 8vo. Nurnb., 1844. Clairville, an Englishman, as we understand, by birth, but an inhabitant of Switzerland, published a work in French and German, called Entomologie Hclvetique, 2 vols. 8vo, with excellent figures. Indeed Schellenberg the engraver was his colleague in the undertaking. Both volumes were printed at Zurich, the first in 1798, the second in 1806. The chief defect of this work consists in the entire and un¬ necessary change in the nomenclature of his predecessors, affected by the author, as will be seen by the following ana¬ lytical table of his systematic arrangement. We add the ordinary names of the orders, which he is pleased to regard in the light of sectional divisions. f Mandibulata. fPterophora, | fi- l2' winged. -j Insecta <| f Haustellata. 1 Aptera, l wingless. f Haustellata. | Mandibulata. SECTIONS. Elytroptera : crustaceous wings. (Coleoptera.) Deratoptera : coriaceous wings. (Orthoptera.) i 3. Dictyoptera : reticulated wings. (Neuroptera.) f 4. Phleboptera : veined wings. (Hymenoptera.) 5. Halteriptera : wings with poisers. (Diptera.) 6. Lepidioptera : scaly wings. (Lepidoptera.) 7. Hemimeroptera : mixed wings. (Hemiptera.) 8. Rophoteira : suckers. 9. Pododunera : runners. Clairville’s work is not complete in the description of genera and species. The first volume, indeed, contains only the coleopterous family of the Curculionidse, and is furnished with sixteen plates illustrative of eleven genera. It is. a minutely laboured publication, beautifully executed, but more sumptuous than accurate in its typography. J. Fr. W. Merest, a preacher at Berlin, born 1743. Kurze EinleiUdg zur Kenntniss d,ei Insecten, See. 3 vols. 8vo, Berk, 1784—87.—Genres des Mouches Dipteres. 2 vols. Biblio graphd g 8vo, Zurich, 1802. Conjointly with C. G. Jabonsky, Herbst has published Natursystem in-und Auslandischer Insek¬ ten, in 21 vols. 8vo. Schmetterlinge, 11 vols. Berk,1783- 1804. Kiifer, 10 vols. Ibid., 1785-1806. Joh. Casp. Fuessli was the author of Magazin fur die Liebhaber der Entomologie. 2 vols. 8vo, Zurich. 1758—9.—• Neues Magazin fur die Liebhaber, &c. 3 vols. 8vo, Ibid., 1782-87. ArchivderlnsectengeschichteAto, Ibid., 1781-86. There is a French translation with the same plates. Winter- E N T O M Biblio- William Lewin, F.L.S., contributed to Entomology graphy. TJie Insects of Great Britain, 1 vol. 4to, London, 1795. It —contains the Papiliones only. Frederick Weber, a German naturalist, and professor at Kiel,wrote Observationes Entomologicce, 1 vol. 8vo, Kiel, 1801. J. C. G. Illiger, professor at Berlin, an excellent natu¬ ralist, who died in early life. He terminated the catalogue of Prussian insects commenced by Theophilus Kugelann, under the title of Verzeichniss der Keefer Preussens, 1 vol. 8vo, 1798. Between 1801 and 1807 he published the Ma- gazinfur Insectenkunde, 7 vols. 8vo ; and during that first- mentioned year his Systematisches Verzeichniss von den Schmetterlingen der Wiener gegend, in two vols. 8vo, like¬ wise made its appearance. It is a revised edition of the systematic catalogue of the environs of Vienna. Illiger con¬ tinued the edition of the Fauna Etrusca of Rossi, com¬ menced by Hellwig, in 8vo, Helmstadt, 1807- John Frederick Wolff, a German physician, has pub¬ lished four fasciculi of a work entitled leones Cimicum de- scriptionibus illustratce, in 4to, Erlangse, 1804. Thomas Marsham, an English entomologist, is well known as the author of Entomologia Britannica, sistens In- secta Britanniee indigena secundum methodum Linnceanam disposita, t. 1, Coleoptera, 8vo, Loud. 1802. It is a meri¬ torious publication for the period, and has been serviceable to the science ; but prodigious advances have been made in all the departments of British Entomology since the time of its appearance. Marsham also published a Monograph of the genus Notoclea, in the 9th vol. of the Linn. Trans. These insects are peculiar to New Holland, and are now better known under the name of Paropsis, bestowed upon them by Olivier. William Kirby, A.M., &c., author of Monographia Apum Anglice, 2 vols. 8vo, Ipswich,, 1802, and (jointly with Mr Spence) of Introduction to Entomology, 4 vols. 8vo, London, 1815-26. These admirable works are too well known to require our praise. The latter has been the chief means of producing whatever may exist of a general taste for Entomology in Britain.—Fauna Boreali Americana (In¬ sects). 4to, fig. ed. Ipsw., 1837.— The genus Apion of Herbs? s Natursystem considered, See. Linn. Trans, vol. 9th, p. 1.— Strepsiptera, a new order of Insects proposed, and the cha¬ racters of the order, with those of its genera,, laid down. Vol. 11th, p. 86.—A Century of Insects, including several new genera, Sec.—A description of several new species of Insects collected in New Holland. Ibid. vol. 12th, pp. 375— 454. This venerable and truly “ good old man,” the father of modern Entomologists, died on the 4th of July 1850, aged ninety-one years. He had been the resident minister of Barham for sixty-eight years, and so we presume may have been regarded as the father of the Church of England. He was president of the Ipswich museum, an institution in which, from its commencement, he took a lively interest. Of late years he had been obliged to retire from active life, whether clerical or scientific. William Spence, F.L.S., &c., Mr Kirby’s able and ac¬ complished coadjutor in the principal work above named, is also the author of various minor essays in entomology, of which we shall name merely his Monograph of the British species of the genus Cholera. Linn. Trans, vol. 11th, p. 123. Adrian Hardy Haworth was the author of Prodromus Lepidopterorum Britannicorum, 4to, Holt., 1802.—Lepi- doptera Britannica sistens digestionem, &c. 4 vols, 8vo, 1803-1827; and of several contributions to the Trans. Ent. Soc., &c. J. R. Schellenberg, a painter and engraver of Zurich, is known to entomologists as professionally connected with two works, of which the text is anonymous. Cimicum in Helvetice aquis et terris degens genus. 1 vol. 8vo, with figures, Turici, 1800.—Genres des Moriches dipteres. 1 vol. 8vo, in French and German, with coloured plates, Zurich, 1803. O L O G Y. 11 He was likewise artistically employed on the Entomologie Biblio- Helvetique, ou Catalogue des Insectes de la Suisse (of which graphy- the letterpress is by M. de Clairville). 2 vols. 8vo, Zurich, 1798-1806. John William Lewin, an English painter, son of Wil¬ liam Lewin already mentioned, published a Natural His¬ tory of Lepidopterous Insects of New South Wales. 1 vol. 4to, with coloured plates, London, 1805. Gaspard Duftschmid has published descriptions of nu¬ merous families of Coleoptera in his Fauna Austrice, 2 vols. 1805-25. A. A. H. Lichtenstein, a professor of oriental languages at Hamburg, published A Dissertation on Tiro Natural Genera hitherto confounded under the name of Mantis, in the 6th vol. of the Linn. Trans. Palisot, Baron de Beauvois,of the Academy of Sciences, was born in 1755, and died in 1820. He is the author of a handsome work in folio, with coloured plates, entitled In¬ sectes recueillis en Afrique et en Amerique, &c. Paris, 1805 et seq. Henry Smeathman has published a History of the Ter¬ mites or White Ants, in the 71st volume of the Philosophi¬ cal Transactions. Christian Steven, director of the imperial botanic gar¬ den of Odessa, has published a Description de quelques Insectes de Caucase et de la Russie Meridionale, in the Mem. de la Soc. Imper. des Naturalistes de Moscou, t. ii. Baumhauer. Novelle Classification des Mouches d deux ailes. 8vo, Paris, 1800. C. L. v. Muller. Entomologisches Tasken-buch fiir Schmetterlinges Sammler. 12mo. fig. Bresl. 1800.—Fauna Lepidopterorum Silesiaca, fyc. Ibid. 1802. J. Fr. Wolff. leones Cimicum descriptionibus illus¬ tratce. 4to, Erlang. 1800-11. J. C. L. Hellwig. Systematisches Verzeichniss von den Schmetterlingen der Weiner Gegend. Braunschw. 1803. A. Afzelius (and F. W. Brannius). Achetce Guinen- scs. 4to, fig. Upsal, 1804. Mich. Buniva. Intorno agli Insetti nocivi. 12mo, To¬ rino, 1804. G. F. Heutsch. Epitome Entomologies systematicce secundum Fabricium, fyc. 4to, Leipz. 1804. C. Iser. Svenk Entomologie. 8vo, Linkop. 1806. J. E. Arrhenius. Monographia Cantharidum et Mal- achiorum Suecice. Lund. 1807. Fr. A. Bonelli. Observations Entomologiques. 2 parts, 4to, Turin, 1809-13.—Descrizione di sei nuove Specie d?InsettiLepidotteri diurnidella Sardegna. 4to, fig. Torino, 1824. We have other entomological papers by this author in the Mem. of the Turin Academy. Bayle Barelle. Saggio Intorno agli Insetti nocivi ai vegetabili economici, fyc,, 8vo, Milano, 1809.—Degli Insetti nocivi aW Uomo, alle Bestie, ed all' Agricoltura. 12mo, Mil. 1824. M. J. Baudet-Lafarge. Essai sur VEntomologie des Dep. du Puy-de-D6me. 8vo, Clermont, 1809.—Monogra- phie des Carabiques du Puy-de-Ddme. 8vo, 1836. A. Ahrens. Fauna Insectorum Europce ; cura Germar et Kaulfuss. 18mo, 20 fascic., Halim, 1812.—Beitrdge zu einer Monographic der rohrkifer {Donacia Fabr.). 8vo, Halle, 1817. G. H. Berglund. Anthracides Suecice. 4to, Lund. 1814. J. J. B. Hemmer. Raupen und Papilions Kalender. 8vo, fig., Coburg, 1814. F. L. P. Bracy-Clark. An Essay on the Bots of Horses and other animals. 4to, fig., Lond. 1815. von Malinouzky. Elementarbuch der Insecten- kunde. 8vo, Quedlinb. 1816. Ch. Malo. Les Papilions. 18mo, Paris, 1816.—Les Insectes, ou choix des plus jolis insectes de la France et des pays etrangers. 12mo, Paris, 1818. 12 E N T 0 M Biblio¬ graphy. F. G. Champneuf. Considerations Medicinoles sur les Insectes. 8vo, Paris, 1817. G. Kunste. EntomologischeFragmente. 8vo, Halle, 1818. Gustavus Paykul, a royal councillor, and member of the academy of Stockholm, is the author of several very valuable works. His earlier publications were monographs of the genera Carabus, Curculio, and Staphylinus, after¬ wards incorporated in his Fauna Suecica {Insecta), 3 vols, 8vo, Upsal, 1800. These contain only the coleopterous tribes. The descriptions are careful and complete. Of the same author, the Monographia Ilisteroidum, 1 vol. 8vo, Upsal, 1811, is deservedly held in the highest estimation. H. M. Gaede has published Beytrage zur Anatomic der Insekten, &c- 4to, Altona, 1815. H. T. L. Reichenbach has published a Monographm Pselaphorum, one small volume, with figures, Leipsic, 1816. John William Meigen, a German naturalist, has pub¬ lished a very complete work on European Diptera : Be- sehreibung derEuropdischen Zwerftilgeligen Insecten. 6 vols. 8vo, 1818-30. 2d edit. 1851. It is accompanied by coloured plates representing a species of each genus, with the details, chiefly deduced from the antennae, of the generic charac¬ ters. Meigen is, moreover, the author of—Abbildung aller bis jetz behannten Europdischen Zweifivgeligen Insecten. 1 Hft. 8vo, fig., Hamm., 1830.—Handbuch fiir Schmetter- lingsliebhaber. 8vo, fig., Aachen., 1827.—Systematische Beschreibung der Europ. Schmetterlinge, mit Abbildungen. 4to, Aachen., 1827-31. Louis Jtjrine, professor of anatomy and surgery at Ge¬ neva, is the well-known author of the Nouvelle Methode de classer les Hymenopteres et les Dipteres, avec fig., Hyme- nopteres, torn. 1, in 4to, Geneve, 1807. His classification is based on the ramifications of the nervures of the wings, and an acquaintance with his work is indispensable to a knowledge of the Hymenoptera. He also published a me¬ moir in 4to, entitled Observations sur les Xenos Vesparum, 1816; and Observations sur les ailes des Hymenopteres,— “ouvrage d’une admirable patience,” says Latreille. The latter appeared in the 24th volume of the Memoires de VAcademie de Turin. Francois Huber of Geneva, born in 1750, died in 1831, the celebrated author of the Nouvelles Observations sur les Abeilles (2d edition), 2 vols. 8vo, 1814, was, though de¬ prived of sight, one of the most accurate and original ob¬ servers of the habits of the insect world. The second volume of the work just named is by Pierre Huber, the son of the preceding. The younger Huber was also the author of Recherches sur les Mceurs des Fourmis indigenes. 1 vol. 8vo, 1810; and of Observations sur les Bourdons. The latter was published in the 6th vol. of the Linn. Trans. Charles John Schcenhemir, a Swede, has published a work under the name of Synonymia Insectorum. 3 vols. 8vo, 1806-8-17. It contains only coleopterous insects, and although not completed even in relation to those tribes, it is a work of great labour, extreme accuracy, and consequently high value. It is of indispensable service to those who de¬ sire to trace the mystified stream of synonyms, so frequently confused and contradictory among the subjects of Entomo- logy. Schcenherr is also the author of an excellent work, entitled Curculionidum Dispositio methodica, 1 vol. 8vo, Leipsic, 1826 ; and he has very recently brought out a much more complete and extended publication on the same great tribe, under the title of Genera et Species Curculioni¬ dum, cum Synonymia hums famUuB. 7 vols. 8vo, Leipz. 1834-43. Leonard Gyllenhal, another noted entomologist of Sweden, is the author of a work in several parts, called In- secta Suecica. 1808-28. "I his is one of the few works on the Coleoptera which has not been left in an uncompleted state ; and the great accuracy oi the descriptions, expressed O L O G Y. in language remarkable alike for precision and perspicuity, Bibli renders it a publication of the very highest value. grapt |r8 Ed ward Donovan, an English naturalist, has published '-•■‘v- a considerable variety of illustrated works on natural his¬ tory. We shall here mention only his entomological pro¬ ductions: An Epitome of the Natural History of the Insects of China. 1 vol. in 4to, 1798.—An Epitome of the Natural History of the Insects of India. 4t.o, 1800-4. 2d ed. 1842.— General Illustrations of Entomology, part i.—An Epitome of the Insects of Asia. 1 vol. 4to, 1805.— The Natural History of English Insects. 16 vols. 8vo, 1792— 1813. The preceding were valuable and praise-worthy publications for their time, though not in every respect characterized by the scientific accuracy or critical skill which distinguish so many of the entomological works of the present day. . Drapiez, professor of chemistry at Brussels, has pub¬ lished Memoires sur un nouveau genus dTnsectes Coleop- teres, and Description de quelques nouvelles especes d’Insectes, in the Annales Gen-rales des Sciences Physiques, Paris, 1819-21. Ferdinand Ochsenheimer is the author of a German work on the Lepidoptera of Europe, Schmetterlinge von Europa, highly esteemed for its critical accuracy and ex¬ cellent descriptions of the species. The first volume was published in 8vo, at Leipsic, in 1806. The author died in 1822, leaving his work in an incompleted state, only four volumes having been published during his lifetime, the last of which appeared in 1816, consisting chiefly of an improved sketch of his arrangement, from the first to the eighty-seventh genus. Before his death, however, only the first forty-three genera were published in detail, with the characters and descriptions of their respective species; these occupy the first three volumes, the last of which ter¬ minates with the genus Eyprepia, for the fourth contains, besides the sketch of the arrangement, only notes concern¬ ing some of the species published in the preceding volumes. The work has been continued by M. Frederick Treitschke, and the English reader will find an abstract of it by the late J. G. Children, Esq., F.R.S., with a list of the species of each genus, and references to one or more of their respec¬ tive icones, in the Philosophical Magazine and Annals for 1829. Where the generic characters appeared meagre or defective, Mr Children has given additional ones from the writings of other entomologists ; and he has also indi¬ cated in numerous notes the new lepidopterous genera (chiefly by Stephens and Curtis), to which the British species mentioned in the text are now to be referred. We may add to the above notice that this great work on the European Lepidoptera, Die Schmetterlinge von Europa, the conjoined labours of Ochsenheimer and Treitschke, is, if not completed, at least terminated, and now consists of 10 vols. 8vo, Leipz. 1806-36. James Hubner. Sammlung Europdischer Schmetter¬ linge. 5 vols. 4to, fig. col., Augsb. 1805-32.—Geschichte Europdischer Schmetterlinge. 4to, Augsb. 1806—34.—■ Sammlung Exotischer Schmetterlinge. 4to, fig., Augsb. 1806-34. This author was a painter of Augsburg, and his work on the European Lepidoptera is one of the most complete which we possess. It has also the advantage of being proportionally less expensive than many other illus¬ trated volumes, and it exhibits a great variety of Larvae. Hubner is the author of several other entomological works besides those named above. Carl. Fred. Fallen. Observationes Entomologicce. Lund. 1802-7.—Monographia Cicadarum Suecice. 8vo, Holmise, 1805-6.—Monographia Cantharidum et Mala- chiorum Suecice. 4to, Lund. 1 807.—Specimen Entomolog. novum Dipterorum disponendi methodum exhibens. 4to, Ibid., 1810-14.—Hydrocorides et Naucorides Sueciac. 4to, Ibid., 1814.—Aribii Suecice, 4to, Ibid., 1814.—An- ENTOMOLOGY. 13 liblio- thracides Suecice. 4to, Ibid., 1814.—Diptera Suecice de- •aphy. scripta. Vol. i. ii., 4to, 1814-27.—Specimen novum Hemip- *^/~a**' ter. disponendi methodum exhibens. Ed. nov. 4to, Lund. 1823.—Dispositio Dipterorum synoptica. 4to, Ibid., 1817. -—Monographia Cimicum Suecice. Ed. nov. 8vo, Hafniae, 1817-—Monograph/a Muscidum Suecice. 4to, Lund. 1820. Monographia Tenthredinum Suecice. 4to, Ibid. 1829.— Hemiptera Succice descripta. Parts i. to ix., 4to, Lond. Gothor. 1829 et. seq.—Monographia Pompilcrum Suecice. 8vo, Ibid. 1829. Besides the preceding, Fallen is the author of many minor treatises on particular tribes of the Dipterous order. He was professor of Natural History in the University of Lund. Francis Klug, M.D., of Berlin, and one of the directors of the museum there, has contributed many treatises to Entomology. Of these we may indicate the following :— Monographia Siricum Germanice, &c. 1 vol. 4to, with co¬ loured plates, Berlin, 1803.—A Critical Review of the genera of Fabricius, derived from Apis of Linnaeus, pub¬ lished in Illiger’s Magazinfur Insectenkunde. 1807.—En- tomologische Monographien. 1 vol. 8vo, with figures, Ber¬ lin, 1824.—Proscopia novum genus Insectorum Orthop- terorum, in folio, with plates.—Entomologice liraziliance Specimen. Dr Klug has published in German (IJericht uber, fyc.) a Rapport on a collection of coleopterous insects from Madagascar, 1 vol. 4to, with plates, Berlin, 1833; and he is the author of an Entomological Annual*—Jahrbucher der Insectenkunde, of which we are acquainted with only a single volume, published at Berlin in 1834. In conjunc¬ tion with Ehrenberg he has figured and described various African and Asiatic insects in Symbolce Physicce, fob, fig. col., Berlin, 1829—30; and has published several monographs of great value. John Louis Charles Gravenhorst, of Gottingen, a skilful entomologist, has composed the following works :— Coleoptera microptera Brunsvicensia. 1 vol. 8vo, 1802.—• Monographia Coleopterorum micropterorum. 1 vol. 8vo, 1806.—Monographic du genre Ichneumon. 1 vol. 8vo, with figures, 1814.—Monographia Ichneumonum Pedemontce regionis, forming a portion of the twenty-fourth volume of the Mem. de VAcad. des Sciences of Turin.—Monographic des Ichneumons Apteres. 1 vol. 8vo, with figures.—Con¬ spectus generum et familiarum Ichneumonidurn, in 4to, conjointly with Nees ab Esenbeck.—Beitrage zur Ento- mologie. 1 vol. 8vo.—Lastly, lehneumonologia Europcea, in 3 large 8vo volumes, 1829, containing above 2800 pages, devoted to the Ichneumonidse alone. Charles Schreibers, director of the imperial cabinet of natural history at Vienna, among his other writings has given us descriptions of various Coleopterous Insects, with figures, in the 6th vol. of the Linn. Trans. 1806. Marcel de Serres, professor of mineralogy to the Fa¬ culty of Sciences of Montpellier, has composed many ex¬ cellent articles on the anatomy of insects, printed in the Mem. du Museum and elsewhere (see especially his obser¬ vations on the Vaisseau dorsal, ibid. 1819), and has pub¬ lished a Memoire sur les yeux composes et les yeux lisses des Insectes, &c. 1 vol. 8vo, with figures, 1813. William Elford Leach, M.D., F.R.S., &c., an Eng¬ lish naturalist of great zeal and intelligence, continued Dr Shaw’s work, under the title of the Zoological Miscellany, 3 vols. 8vo, Lond. 1814-17. He was also the author of various elaborate treatises on insects, published in the Linn. Trans.,send in the British and foreign Encyclopcedias. His enthusiasm for Entomology has been productive of an advantage to the study in this country, which has now spread insensibly far beyond the benefit directly derivable from his own particular labours. His early death was much deplored. Nees ab Esenbeck, a noted botanist, has published Monoqraphie der Ichneumoniden. 2 vols. 8vo, Stuttg. 1828. —Also Hymenopterorum Ichneumonibus affinium Mono- Biblio- graphice. Vol. 1st and 2d, Stuttgard, 1834. graphy. C. A. Walckenaer, beside his Faune Parisienne, and his works on the Araneides, has published Memoires pour servir d VHistoire Naturelle des Abeilles solitaires. 1 vol. 8vo, Paris, 1817.—Also Reeherches sur les insectes nuisibles d la vigne, connus des Anciens et des Modernes, et sur les moyens de s’opposer d leur ravages. 8vo, Paris, 1835. William Sharpe Macleay, A.M., is the author of a work named Horce Entomologicce, or Essays on the Annu- lose Animals, 1 vol. 8vo, in two parts, 1819-21, remarkable for its elucidation of the circular progression of affinities. It is a production of great value. The same author has published Annulosa Javanica, part 1st, 4to, Lond. 1825, and has con¬ tributed various papers to the Linn. Trans., the Zoological Journal, and the Transactions of the Zoological Society. The Rev. Landsdown Guilding, of St Vincent’s, de¬ ceased, was one of the most active of the naturalists ever sta¬ tioned within the tropics. He was the author of several ento¬ mological papers published in the Transactions of the Lin- ncean Society (1829, &c.), and the Zoological Journal. John James Hagenbacii, who died in 1826, was one of the conservators of the Royal Museum of Leyden. He made known a singular coleopterous insect, from Java, in his Mormolyce novum genus. 1 vol. 8vo, with a plate, Nurem¬ berg, 1825. He was also the author of Symbola Faunae Insectorum Helvetice. Fascic. 1, with plates, Basil, 1822. Aroid David Hammel wrote Quelques Observations sur la Blatte Germanique, in 8vo, Petersburg, 1821 ; and between that year and 1827 he published six numbers of Essais Entomologiques. Lepelletier de St Faroeau is known as the author of a Monographie des Chrysis des environs de Paris, in the Ann. du Mus. d'Hist. Nat. No. 58, and of a Monographia Tenthredinetarum Synonymia extricata, 1 vol. 8vo, Paris, 1823. He has communicated to the Academy of Sciences Observations sur les accouplements de diverses especes de Volucelles, genre de Dipteres ; and has composed, jointly with M. de Serville, the tenth volume of Entomologie de VEncyclopedic Methodique. With M. Brulle, he has pub¬ lished a Monographie du Genre Crabro in Ann. Soc. Ent. iii., 683 ; and in his own proper person is the author of Hist. Nat. des Insectes Hymmopteres. 3 vols. 8vo. fig. Paris, 1836. C. R. G. Wiedmann, professor at Kiel, has written Diptera exotica, 1 vol. in 8vo, part first, with figures, Kiel, 1821. He is likewise the author of Analecta Entomologica, in 4to, with plates, Kiel, 1824, and of other works. C. L. Sahlberg, professor of natural history at Abo in Finland, commenced an Entomology of that country, under the title of Dissertatio Entomologica Insecta Fennica enumerans. 8vo, 1817-1823. He is also the author of Periculi Entomographid. 1 vol. 8vo, with plates, Abo, 1823. George Dahl, of Vienna, an entomological merchant, or dealer in insects, and a well-instructed entomologist, has printed catalogues of the different orders, particularly Co¬ leoptera und Lepidoptera. 1 vol. 8vo, Vienna, 1823. M. Charpentier is favourably known as the author of Horce Entomologicce adjectis tabulis novem coloratis. 4to, 1825. Libellulince Europece, descript, et depict. Lipsice, 1840. Orthoptera, descript, et depict. Lips., 1841-45. John William Dalman, formerly director of the Stock¬ holm museum, is known as the author of the following works:—Insectorum Nova Genera. 8vo, Holmiae, 1819. —Analecta Entomologica, with plates, 1 vol. 4to, Holmiae, 1823.—Prodromus Monographice Castnice, with a plate, 1 vol. 4to, 1825.— Om nagra svenska arter of Coccus, with plates, 4to, Stockholm, 1826.—A monograph on the Chcdcidites, or Pteromalini of the author. 1 vol. 8vo, 1820. —A Synoptical Table of the Butter flies of Sweden, published in the Memoires de VAcademic de Stockholm. 1816.—Ev>he- 14 E N T O M Biblio- merides Entomologicce. 1 vol. 8vo, Holmiae, 1824.—A me- graphy. ui0ir on certain Ichneumonides. 1 vol. 8vo, 1826.—Also of V'—a memoir in the Swedish language, on the Insects inclosed in Amber. 1 vol. 8vo, 1826. Gotthelf Fischer de Waldheim, a German naturalist, is (or was) director of the Imperial Museum of Moscow. To this author we owe innumerable papers, entomological and other, in the Memoirs and Bulletins of the Societe Imper. de Moscow, &c. We shall here name only some of such as have been published apart. Ento mo graph ia Imperii Russici (et genera Insectorum systematice exposita, &;c.) 4 vols. 4to, col. pi., Mosquae, 1820-43.—Lettre au Dr Pan¬ zer, contenant un notice sur plusieurs nouveaux Insectcs. 4to, Ibid. 1820.—Notice sur l’’Argus de Perse {Malleh de Mianeli), decrits par les voyageurs sous le nom de Punaise vsnimeuse de Miana. 4to, Ibid. 1823.—Lettre sur le Physo- dactyle, nouveau genre de Coleopteres Elateroides. 8vo, Ibid. 1824.—Notice sur le Tettigopsis, nouv. gen. d'Orthop- teres de la Russie. 8vo, Ibid. 1830.—Notice sur Phlocerus, nouv. gen. d’Orthop. de la Russie. 4to, Ibid. 1833.—Cata- loqus Coleopterorum in Siberia orientali, &jc. 8vo, Mosc. 1842. J. E. Fischek von Roeslerstamm. Ueber das Tbdten und Aufu'eichen der Schmetterlinge. Prag. 1827.—Abbil- dungen zur Bericlitigung und Ergrinzung der Schmetter- lingskunde besonders der Mikrolepidopterologie als Suppl. zu TreitschMs u. Ilubner's Europ. Schmetterlingen. 4to, fig. Leipz. 134, et seq. T. Babt. Fischer. Tentamen Conspectus Canthari- diorum. 4to, Monach. 1827. Leop. Henr. Fischer. Dissert, inaug. zooL sistens enumerationem Coleopterorum circa Friburgum Brisg. <$rc. 8vo, 1843. A. M. G. Dumerie. Of the numerous writings of this distinguished naturalist, we shall now name those on ento¬ mology alone. Exposition d’une methode Naturelle pour Vetude et la classification des Insectes. 8vo, fig. Paris, 1801. —Considerations generates sur la classe des Insectes. 8vo, fig. Paris, 1823. He has published many excellent Rap¬ ports in the Comptes Rendus. Leon Dufour, a physician in Saint Sever (Landes), is the author of several highly esteemed contributions to ento¬ mology. We shall here mention Memoire Anatomique sur une nouvelle espece d’lnsecte du genre Brachine, in the 18th vol. of the Annales du Museum d’Hist. Nat. Paris, 1811. —Memoires sur VAnatomic des Coleopteres, des Cigales, des Cicadelles, des Labidoures or Forficulce;—sur une nouvelle espece d’Ornithomyia;—sur le genre Ocyptere —all printed in the Annales des Sciences Naturelles. 1824-28. He has also written Sur VAnatomic des Scolies, in the Journal de Physique. Sept. 1818; besides describing many new spe¬ cies of Coleoptera, and the anatomy of Ranatra linearis, and of Nepa cinerea, in the Annales Generates des Sciences Physiques. Among his other works may be mentioned, Recherches Anatomiques et Physiologiques sur les Hemip- teres, accompagnees de considerations relatives d Vhistoire naturelle et d la classification de ces insectes. 1 vol. 4to, with plates, Paris, 1833.—Recherches anatomiques, &jc., sur les insectes Coleopteres des genres Macronychus et Elmis. 8vo, Paris, 1835.—Memoire pour servir d Vhistoire des Odyneres,fyc. 8vo,Ibid. 1839.— Hist.desmetam. des Cecido- myes. 8vo, Ibid. 1840.— Observations sur les metam. du Cerceris bupresticida, fyc. 8vo, Ibid. 1840.—Recherches anatomiques et physiologiques sur les Orthopteres, les Hymenopteres, et les Neuropteres. 4to, Ibid. 1841. A. J. Duponchel is the continuator of the Histoire Naturelle dcs Lepidopteres de France, of the late M. Go- dart, 11 vols. 8vo, Paris, 1821-40. There is a Supplement to the preceding, in 4 vols. 8vo, Ibid. 1834-45. He has published a Monographie du genre Erotyle, with plates, in the 12th vol. of the Memoires du Museum', and is, more- O L O G Y. over, the author of the following works: Iconographie des Chenilles pour faire suite d VHist. Nat. des Lepidoptercs de France. 31 pl.col.8vo, Paris, 1832-42.— Tableau methodiques des Lepidopteres de lEurope, distribues en families, fc., pour servir de complement et de rectification d VHist. Nat. des Lepidopteres de France. 8vo, Paris, 1844. M. Duponchel has contributed largely to the Ann. de la Soc. Ent., and other periodicals. Robineau-Desvoidy, a physician of St Saveur, has writ¬ ten several ekborate treatises relating to Entomology, such as Recherches sur Vorganisation vertebrale des Crustaces, des Arachnides, et des Insectes. 1 vol. 8vo, Paris, 1828.— Essai sur la tribu des Culicides, in the 2d vol. of Mem. de la Soc. d’Hist. Nat. de Paris ; and a work Sur les Dipteres de la tribu des Muscides, printed in the Mem. des Savants Etrangers de VAcad, des Sciences. John Curtis, F.L.S., &c., an English entomologist, com¬ menced and concluded several years ago a work entitled Illustrations of the Genera of British Insects. “ Leurs characteres,” says Baron Cuvier, “ y sont representes avec la plus grande fidelite.” It may be safely asserted, that for elegance of design and accuracy of execution, combined with the most beautiful and exquisitely finished mode of colouring, it is a matter of doubt whether any rival to its plates can be found within the entire range of entomologi¬ cal productions. A new and less costly edition has recently appeared. Mr Curtis has also published a Guide to an ar¬ rangement of British Insects. 8vo, 1831. James Francis Stephens, F.L. & Z.S., published a Systematic Catalogue of British Insects, in one large vo¬ lume 8vo, 1829. Although it presents merely a list of names and synonyms, this is a most praiseworthy and valu¬ able work, and was the first to exhibit a systematic view of our indigenous species. It enumerates 10,012 names of native insects, a number greatly surpassing what could have been anticipated a few years back. Mr Stephens is like¬ wise the author of a well-known work, Illustrations of Bri¬ tish Entomology, in 10 vols. 8vo, London, 1827—35. It is pleasingly adorned in a pictorial point of view, and, con¬ taining very excellent descriptions, has not failed in being classed by competent judges with the most successful efforts in its line. By the same writer we have also the Nomen¬ clature of British Bisects, 2d edit. 1833,—a useful compen¬ dium. H. J. Stainton has published several papers relating to insects in the Trans. Entom. Society. By the same author we have also the three following works:—Nomenclature of British Insects. 2d ed. 1833.—An Abstract of the Indi¬ genous Lepidop ter a, contained in the “ Verzeichniss bekann- ter Schmetterlinge” of Hubner. London, 1835.—A Manual of British Coleoptera, or Beetles, containing a brief De¬ scription of all the species of Beetles hitherto ascertained to inhabit Great Britain and Ireland. 8vo, Lond. 1839. William Syvainson, F.R.S., &c., a noted naturalist, and excellent draftsman, has published, in his Zoological Illus¬ trations (first series, 3 vols. 8vo, 1820-3, second series, 3 vols. 8vo, 1832-8), many beautiful figures of new and rare insects, chiefly Lepidoptera. The careful study of Mr Swainson’s Illustrations, as well as of those of Mr Curtis, must prove delightful, not alone to the mere entomologist, but to every eye accustomed to receive pleasure from the tasteful representation of nature. The figures of our present au¬ thor are almost all drawn by hfmself on stone. His more recent entomological work is, On the History and Natural Arrangement of Insects conjunction with Mr Shuckard). 8vo, Lond. 1840. W. Wood, F.L.S., is author of Illustrations of the Lin- ncean Genera of Insects, 2 vols. 12mo, London, 1821; and of Index Entomologicus, or a complete illustrated Catalogue of the Lepidopterous Insects of Great Britain, 8vo, Lond. 1839-45. This useful and meritorious work contains 1944 Biblio.' graph j! !l lio hj ENTOMOLOGY. 15 coloured figures of butterflies and moths. A supplement by Mr Westwood has since appeared, containing the re¬ cently discovered species. Thomas Horsfield, M.D., an English naturalist now or formerly in the service of the Honourable East India Com¬ pany, is the author of Catalogue of Lepidopterous Insects in the museum of that Company, parts i. and ii. royal 4to, London, 1828-29,—a work of great interest, from its excel¬ lent representation of the metamorphoses of many Javanese butterflies. Francis Gebler, a Russian physician and naturalist, stationed at Barnaoul in Siberia, has published a memoir in 4to, entitled Ohservationes Entomologicce, besides various papers in the Memoires de la Soc. des Naturalistes de Mos- cou, chiefly vols. v. vi. and viii.; also, Catalogus Co/eopte- rorum Siberice Occidentalis, &jc. 8vo, Berlin, 1830.—Notce et additamenta ad hunc Catalogum. 8vo, Mosc. 1833. He has done much to illustrate the insects of Siberia, of which otherwise we know but little. Ernest Frederick Germar, a German naturalist, pro¬ fessor of mineralogy at Halle, is the author of Dissertatio sistens Bombycum Species, fyc. 4to, Leipzig, 1811. Con¬ joined with Zinken Von Zommer, he continued Illiger’s Magazin fiir Insektenkunde, under the title of Magazin der Entomologie, 4 vols. 8vo, Hallae, 1813-21 ; and with Kaul- fuss, carried on Ahren’s Fauna Insectorum Europce. Fascic. iii.-viii., 8vo, Ibid. 1816-22. In his Reise nach Dalmatien (8vo, Altenb. 1817), he gives an account of the insects he encountered. He is the author of Insectorum Species Novce aut minus cognitce, fyc. 1 vol. 8vo, fig., Halle, 1824. Pro¬ fessor Germar has particularly applied himself to the Cur- culionidce ; and in the work last named, in which lie de¬ scribes 891 Coleopterous species, 318 belong to that splendid family. He has written a great many separate papers in the Mag. der Ent, Silbermann’s Rev. Ent., and in a work con¬ ducted by himself, the Zeitschrift f ir die Eutomologie, 5 vols. 8vo, Leipz. 1839-44. Jean Babtiste Godart compiled the article Papillons of the Encyclopedie Methodique, and wrote the first five volumes of the Histoire Naturelle des Lepidopteres ou Pa¬ pillons de France, commenced in 1821, and continued (Go- dart being dead) by M. Duponchel. It now consists of 11 vols. (in 13) 8vo, Paris, 1821-40. The Supplements form 4 more vols. Ibid. 1832-45. We likewise owe to M. Go- dart (in conjunction with MM. Duponchel and Guenee) Ico- nographie des Chenilles pour faire suite d I’Hist. Nat. des Lepidopteres, fyc., in livraisons, 8vo, Paris, 1832-42. Francis Bonelli, director of the cabinet of natural his¬ tory, and professor of zoology, at Turin (now deceased), was the author, among other works, of Observations Entomo- logiques, in two parts, published in the Memoires de l’Aca¬ demic des Sciences de Turin, for 1809. Their object is the genus Carabus of Linnaeus, which he has greatly divided ; and most of his new genera have been received and adopted by entomologists. In the thirtieth volume of the above- named memoirs, Professor Bonelli has also published Des- crizione de sei nuovi insetti lepidopteri della Sardegna, 4to, Torino, 1824. Charles Gustayus Carus, professor at Dresden, is the author (we need not here mention his well-known works on physiology and comparative anatomy) of a Memoir on the Circulation of the Larvce ofNeuropterous Insects. 4to, Leip- sic, 1827. J. Chabrier has composed a series of memoirs on the flight of insects, in which the muscular economy is well de¬ scribed. They are now published in a collected form, with the title of Essai sur le Vol des Insectes, 1 vol. 4to, Paris, 1820. C. G. Mannerheim, a councillor of the Emperor of Russia, has contributed to Entomology:—Eucnemis insec¬ torum genus, 1 vol. 8vo, with plates, 1823:—Observations sur le genre Megalope, in the tenth volume of the Memoirs of Biblio- the Imperial Academy of Sciences of St Petersburg, 1824 : graI,hy' —Description de quarante nouvelles especes de Scarabceides du Brazil, in 4to, with plates, 1829. M. Mannerheim is likewise the author of Precis d’un nouvel arrangement de la famille des Brachelytres, in 4to, Petersburg, 1830; and has contributed to the Bulletin des Nat. de Mosc. and the Rev. Zool. Straus-Durckheim is the author of a very admirable work,—Considerations generales sur VAnatomic comparee des animaux articules, auxquelles on joint Vanatomie de¬ scriptive du Hanneton. 1 vol. 4to, with plates, Paris, 1828. Frederick Treitschke, a writer of authority on the Le¬ pidopterous order, has continued Ochsenheimer’s Schmet- terlinge von Europa, 10 vols. 8vo, Leipz., 1807-35; and is the author of Hulfsbuch fiir Schmetterlings sammler. 8vo, fig., col., Wien. 1834. J. Gust. Billberg. Monographia Mylabridum. 8vo, Holmise, 1812.—Enumeratio Insectorum in museo suo. 4to, Ibid., 1820.—Synopsis Faunce Scandinavue. 12mo, Stock¬ holm, 1827. Etienne Geoffroy Saint-Hilaire. Memoires sur Vorganisation des Insectes. 4 parts, 8vo, Paris, 1820. The writings of this great anatomist are innumerable on other departments of natural history. Fr. Eschscholtz. Entomographien. 8vo, fig. Berk 1822.—Species Insectorum novce descriptce. Mosquae, 1823. More recently we are indebted to this author for many ex¬ cellent contributions to the Mem. Soc. Nat. Moscou, fyc. J. A. Arnberg. Diss. Entom. de Hemipteris maxillosis capensibus. 4to, Upsal, 1822. Baron F. de Lafresnaye. Reflexions sur les Localites propres a certain especes d?Insectes. 8vo, Paris, 1823. J. K. Broch. Correspondance Entomologique. 8vo, Mulhausen, 1823. J. Kochlin. Correspondance Entomologique. 8vo, fig. Mulh., 1823. C. U. Werterling. Dissert. Entomol. de Hemipteris rostratis capensis. 4to. Upsal, 1822. B. F. Fries. Observationes Entomologicce.—Monogra¬ phia Simuliarum Suecice. 8vo, fig. Stockh., 1824.—Mono¬ graphia Tanyporum Suecice. 8vo, fig., Lund., 1823. Jerm. The Butterfly Collector'sVademecum. 12 mo, Ipswich, 1824. B. Jager. Catcdogus Insectorum, quce in Chersonesum Tauricum collegit. 8vo, fig., St Petersb., 1827. J. Vander-Hceven. Systematische Beschrijving van eenige Insecten van Noord-Nederland. 8vo, Amsterdam 1827. A. Ingpen. Instructions for collecting, rearing, and pre¬ serving British Insects. 18mo, fig., col., Lond. 1827. Ch. Lier and F. Duval. Collection des Lepidopteres ou Papillons des Pays-Bas et de France. 8vo, fig., Brux. 1827. Bern. Angelini. Ascalafi Italiani, con nuova Specie. 8vo, Milano, 1827. M. Sonogla has contributed to entomology a work under the title of,—Insectorum Ligurice. Species novce. 2 vols. 4to. Genuae, 1827. F. L. Lebreux. Hist. Nat. des Lepidopteres, ou Papil- lon. 12mo, Valencien. 1827. Al. Lefebure. Description de divers Insectes inedits recueillis en Sidle. 8vo, fig., Paris, 1837. This author has also contributed to the Ann. de la Soc. Ent. de France. Gius. Bertoloni. Lettera a Conte Fil. Re Su Varii Insetti nocivi all'Agricoltura. 8vo, Milano, 1812.—Memo- ria sopra due rare Farfalle trovate nel Territorio Lunese. 8vo, fig., Bol. 1829.—Descriptio novce speciei e Coleopte- rorum ordine. 4to, fig., Bonon. 1837.—Diss. de Insectis quce hieme et vere ann. 1832-33 sata Tritici vastarunt in 16 E N T 0 M Biblio- cams Italuz. 4to, fig., Bonon. 1837.—Fauna Insettologica graphy. gei territorio Bolognese. Thkod. Thon has published some representations of exotic Coleoptera, under the title of Ahbildungen auslan- discher Inseeten. I. Kafer, 4to, Jena, 1826-28.—Also ISeue Schmetterlingsbelustigungen. Prospectus, 8vo, Jena, 1828. O. G. Costa. Osservazione sugli Insetti deWOlivo e delle Olive. Atti di Napoli, 1828.—Specie Nuove di Le- pidopteri del Begno di Napoli. 8vo, fig., Nap. 1832.—Nu-. ove Osservazione intorno alle Cocciniglie ed ai loro pretcsi maschi. 4to, fig., Napoli, 1835.—Memoria degli Insetti di terra Otranto. Atti Accad. Nap. \v—l)escrizione degli Insetti cite vivono ne fumajuoli del cratere del Vesuvio. 4to., Ibid., 1836. Fr. Frolich. Enumeratio Tortricum, &c. 8vo, 1 ubing. 1828. Berleze. Destruction de la larve du Hanneton. 8vo, Paris, 1828. Leon Lalande. Manuel Entomologique pour la Clas¬ sification des Lcpidopteres de France, fyc. 2 vols. 8vo, fig. Paris, 1829. Francis Etienne Guerin-Meneville. This assiduous author and excellent draftsman has contributed largely to entomological science, especially in the way of illustrated works. A great majority of his scientific papers have ap¬ peared in the Mag. de Zoologie, and the Rev. Zoologique, of which periodicals he has had the direction. His Icono- graphie du Regne Animal of Cuvier illustrates the class Insecta (of which there are 111 plates), in common with all the other great groups, and consists of 7 vols. 8vo, Paris, 1829-39. He has published a Magazine dEntomologie, ou Description et Figures des Insectes inidits ou non encore figurees, 8vo, Paris, 1830; and, jointly with M. Percheron, Genera des Insectes, ou Exposition detaillee de tons les caracteres propres d chacun des genres de cette classe d’ani- maux. 8vo, fig. col., Paris, 1831-35. He worked the ento¬ mological portion of Duperrey’s Voyage autour du Monde (fob, Paris, 1829), of Belanger’s Voyage aux Indes Orien- tales (4to, Paris, 1831-44), of Bory de St Vincent’s Expe¬ dition Scientifque en Moree (4to, Paris, 1832-5), and of Delessert’s Souvenirs d'un Voyage dans Vlnde (8vo, Paris, 1843). Along with M. Goudot he has given us an account of Insectes nouveaux observes sur les plateaux des Cordil- leres et dans les Vallees Chaudes de la Nouvelle Grenade ; and (with Reiche) has described some Abyssinian insects in the Voyages of Ferret and Galinier—of Vaillant and Lefebure. Of these later essays we do not know the date. M. Guerin’s latest work, to our knowledge, is his Recherches sur les vers d soie sauvages et domestiques. 8vo, Paris, 1854. Jean Macquart. This author excels in his knowledge of the Dipterous order. Insectes Dipteres du Nord de France. 5 vols. 8vo, fig., 1825-29.—Hist. Nat. des Insectes Dipteres; ouvrage faisant suite d Buffbn. 2 vols. 8vo, fig., Paris, 1834-35.—Dipteres Exotiques nouveaux, ou peu connues. 3 vols. 8vo, fig., Paris, 1836-40.—Memoire sur les harmonies entomologiques, lu en seance generale du Con- gres Scientifque de France. 8vo, Arras.—Memoires sur les Insectes Nuisibles d VAgriculture Ibid. (Zuchold’s Bibliotheca, 1854.) John William Zetterstedt, a Swedish naturalist, has published several works on the entomology of northern Europe. Orthoptera Suecica disposita et descripta. 8vo, Lundae, 1821.—FaunaInsectorumLapponica. 8vo, Hamm, 1828.—Insecta Lapponica. 4to, Leipz., 1838-40.—Diptera Scandinavian disposita et descripta. 9 vols. 8vo, Lundae, 1842-50. Jean Victor Audouin (now deceased), sub-librarian to the Institute ol France, and professor in the Jardin des Plantes, is the author of several signal works.—Recherches Anatomiques sur les thorax des animaux articules, et celui O O GY. des Hexapodes en particuliers. 8vo, Paris, 1821.—Rech. Biblio Anat. sur le Drile jaunatre. 8vo, Ibid., 1824. Conjointly graph] with M. Milne-Edwards, M. Audouin is author of Icono- ' v- graphic des Insectes, 32mo, Paris, 1828; and of Resume dEntomologie. 2 vols. 8vo, Ibid., 1829.—With M. Brule he has published Hist. Nat. des Insectes, traitant de leur Organisation, de leurs Mceurs en general, &c. 4 vols. 8vo, fig. col., Paris, 1834-36;—and Description des Especes nouvelles ou peu connues de la famille des Cicindeletes, faisant partie de la Coll, du Museum. 4to, fig. col., 1839. Many years ago he gave an Explication Sommaire of the entomological plates of the great French work on Egypt. His latest and most remarkable work is his Histoire des Insectes ibl ap ■v nuisibles d la vigne et particularement de la Cote d’Or, See. (6 livrais.) 4to, pi. col., Paris, 1840-42. This production almost equals in minute and laborious accuracy the famous anatomical volume by Lyonnet on the Chenille de Saule. H. Milne-Edwards. Of this distinguished writer on comparative anatomy and physiology, the only work with which we are acquainted relating specially to insects is the Resume dEntomologie, just mentioned as a joint-produc¬ tion with M. Audouin, 2 vols. 8vo, Paris, 1828-29. J. A. Boisduval. This noted entomologist was formerly conservator of the collection of Comte Dejean, and has published numerous works on insects, all of great value. Notice sur cinque especes nouvelles de Lepidopteres dEu- rope. 8vo, fig., Paris, 1827.—Monographic des Zygcenides suivie d'un Tableau methodique de classification des Coleop- teres. 8vo, Ibid., 1828.—Europceorum Lepidopterorum Index Methodicus. 8vo, Ibid., 1829.—Partie Entomolo¬ gique de la Relation du Voyage autour du Monde en 1826-29, par M. Dumont d’Urville, 5 livraisons, fob, Paris.—Faune Entomologique de Madagascar, Bourbon, et Maurice; partie des Lepidopteres, avec des notes sur leurs mceurs par Sganzin. 8vo, fig., Paris, 1833.—Faune Entomologique de V Oceanic, contenant la description de toutes les especes de Coleopteres, fyc., decouvertes jusqu d ce jour dans cette partie du monde, et les especes des autres ordres rapportees par VExpedition de i Astrolabe. 2 vols. 8vo, atlas, Paris, 1832-35. In this work the author has given a descriptive catalogue of the insects of Australia, and the islands of the Pacific, so far as they had been then as¬ certained, or his opportunities extended.—LEntomologie du Voyage autour du Monde sur la Corvette la Coquille. 2 vols. 8vo, ph cob in folio, Paris, 1835.—Species general des Lepidopteres. 8vo, Paris, 1836.—leones historiques des Lepidopteres dEurope nouveaux ou peu connus. 8vo, Paris, 1832-41 (par livraisons).—Hist. Nat. des Insectes Lepidopteres. 8vo, Paris (in Suites a Buffon).— Genera et Index Methodicus Europceorum Lepidopterorum. 8vo, Paris, 1840. In conjunction with M. Lacordaire, our author has published, Faune Entomologique des environs de Paris, &c., Coleopteres. 1 voh 18mo, Paris, 1835 ;—with Dejean and Aube, Iconographie et Hist. Nat. des Coleopteres dEurope. 12 vois. 8vo, ph cob, Paris, 1829-40;—with Leconte, Hist. gen. et iconographie des Lepidopteres et des Chenilles de VAmerique Septentrionale. Par livraisons. 8vo. Paris, 1830-42 ;—with Rambhur and Graslin, Col¬ lection iconographique et historique des Chenilles dEurope, &e. Par livraisons, 8vo. Paris, 1832-37.—M. Boisduval has recently contributed to our knowledge of the Lepidop- tera of California in the Ann. de la Soc. Ent. of France. George Samouelle is the author of Nomenclature of British Entomology, alphabetically arranged. 8vo, Lon¬ don, 1819.— The Entomologist's useful Compendium, See. 8vo, with figures. Lond., 1819.— General directions for collecting and preserving Exotic Insects, Sec. 8vo. Lond. 1826.— The Entomological Cabinet. 2 vols. 8vo, Lond. 1834. L. Arragona. De quibusdam Insectis novis aut ra- rioribus. 8vo, Tic. Reg. 1830.—De quibusdam Coleop- teris Italice Tentamen. 8vo, Tic. Reg. 1830. E N T O M iblio* James Rennie. Insect Architecture, to which are added, aphy. Miscellanies on the Ravages, the Preservation for pur- ~ J poses of Study, and the Classification of Insects. 2 vols. 8vo. Lond. 1830. New Edition in Knight’s Weekly Vo¬ lume (vols. 39 and 40), Ibid,, 1845.—Alphabet of Insects, for the use of Beginners. 12mo, Lond. 1832. Chr. Zimmekmann. Monographic der Carabiden. 8vo, Berl. u. Halle, 1831-32. F. S. Hemprich (and C. G. Ehrenberg).—Symbolce physical, seu icon, et des. Insectorum quce in itinere, Sc. Folio, Berol. 1830-34, Franck. Catalogue des Lepidopteres de sa Col¬ lection. 8vo, Strasb. 1830. Aloys Cadolini. Enumeratio Carabicorum Ticinen- sium, &c. 8vo, Ticini Reg, 1830. Brambilla, Enumeratio Caraborum Ticinen- sium. 1830, P. W. B randsten, Bombi Scandinavice, monographia tractati et Iconibus illustrati. Lond. Goth. 1832. Maximilian Spinola, a Genoese of noble birth, and an accomplished naturalist, is the author of the following works: —Insectorum Ligurice species novce ant rariores. 2 vols. 4to, fig., Genuae, 1806-8.-—Essai sur les Genres d’Insectes ap¬ purtenant d Vordre des Hemipteres, &c. 8vo, Genes. 1837, Paris, 1840.—Essai sur la Eulgorelles. 2 vols. 8vo, fig., Genes, 1839.—Description d’un nouveau genre de Coleop- teres Xylophages, et de quelques autres Insectes. 8vo, fig. Paris, 1839.— Considerazioni sopra i costumi degli Insetti Imenotteri del genere Sirex, Fab., e sopra il miglior porto dei Sireciti nel methodo razionale. 8vo, Genova, 1843.— Osservazioni sopra i caratteri naturali di trefamiglie d’In¬ setti imenotteri, le Vesparie, le Massaride, e le Crisidide. 8vo, Geneva, 1843.—Essai Monographique sur les Clerites, in¬ sectes Coleopteres. 2 vols. 8vo, pi., col., Genes, 1844.— Tavola sinottica dei generi spettanti alia classe degli In¬ setti Artroidignati, Hemiptera, Linn. 4to, Modena, 1850. Signor Spinola has moreover contributed numerous ento¬ mological memoirs, of a more special nature, to the Avin. du Mus., the Ann de Soc. Ent., the Revue Zoologique, and other periodicals, T. E. Kernell. Exercitationes hymenopterologicce ad Must, faunam Suecicam. 8vo, Lond. Goth. 1831. F. C. Kielsenn. leones Insectorum. 8vo, Hafn. 1835. R. A. Philippi, in the form of an inaugural dissertation, has given us Orthoptera Berolinensis. 4to,fig., Berol., 1830. Max. Perty. Delectus animalium articulatorum quce in Itinere per Braziliam collegerunt Dr de Spix et Dr de Martius. Fol. fig. fasc. i.-iii., Monach, 1830-33.— Obser- vationes nonnullce in Coleoptera Indice Orientates. 4to, Monach, 1831.—De Insectorum in America, Meridionale habitantium vita genere moribus ac distributionegeographied Observationes nonnullce. Fob, Ibid. 1833. T. Bruand. Entomologie. 8vo, Besancon, 1844. Aug, Brulle. Coup-d’ceil sur VEntomologie de la Moree. 8 vo, Paris, 1831.—Hist. Nat. des Insectes Coleop¬ teres. Paris, 1834.— These sur le Gisemont des Insectes fossiles, fyc. 4to, Paris, 1839.—Also various papers in the Ann. de la Soc. Ent. de France, and (with Guerin-Mene- ville) the entomological portion of the French Expedition Scientifique en Moree, 4to, atlas fol. To M. Brulle we are more recently indebted for a work on the Ichneumons, forming the fourth volume of the Suites d Buffon. Giuseppe Gen^. Author of various contributions to entomology in the Memoirs of the Academy of Turin, and other foreign works. He has published apart, Su gli Insetti pin nocivi. 8vo, con. tav., Milano, 1827.—Saggio di una Monographia delle Forjicule indigene. 4to, Padua, 1832.—De quibusdam Insectis Sardinice novis aut minus cognitis. Fasc. i. ii., 4to, Taurini, 1837-8.—Memoria per servire alia Storia Naturale di alcuni Imenotteri. 4to, Modena, 1842.—Saggio su gli Insetti pin dannosi alV Agri- VOL. IX. O L O G Y. 17 coltura, agli animali domestici, ed aiprodotte delVEconomia Biblio- rurale. 8vo, Milano, 1827, 2d edit. 1836.—Istruzione su graPhy- gli Insetti pin dannosi alV Agricoltura in Piemonte, e su i mezzi pin facili di distruggioli. 8vo, Torino, 1840. F. Villiers, and Guenee. Tableaux synoptiques des Lepidopteres dUEurope, contenant la description, &jc, 4to, fig., Paris, 1834. A. Guenee. Microlepidopterorum Europceorum Index Methodicus. 8vo, Paris, 1846. To this author we also owe three volumes published in the Suites d Buffon, de¬ scribing the various species of Noctuce, and a fourth con¬ taining the Pyralidce. He is now engaged on the Geome- tridee and Bombycidce. J. W. Helfer. Terminoloqia Entomoloqica. 8vo, Ticini Rez. 1832. Fr. J. Pictet of Geneva, is the author of many excel¬ lent and elaborate works. Memoire sup les Larves des Nemoures. 8vo, fig., Paris, 1832.—Recherches pour servir d VHistoireetdVAnatomic desPhryganides. 4to, fig., Geneve, 1834.—Note sur les Organes respiratoires des Capricornes. 4to, fig., Ibid. 1836.—Description de quelques nouvelfes espcces de Neuropteres du Museedes Geneve. 4 to, fig., Ibid. 1836.—Histoire Naturelle, generate et particuliere des In¬ sectes Neuropteres: I. Famille de Perlides. 8vo, fig., Ibid. 1841. J. P. Rambur. Catalogue des Lepidopteres de l’Isle de Corse, avec la description et la figure des especes inidites. 8vo, fig., Paris, 1832.—Faune Entomologique de VAnda- lousie. 2 vols. 8vo, fig., Ibid. 1837.—A more recent volume on Neuropteres, in the Suites d Buffon. Vino. Kollar. Monographia Chlamydum. Folio, fig. col., Vien. 1824.—Brasiliens Vorziiglich Idstige Insecten. 4to, fig., Wien. 1832.—A Treatise on Insects injurious to Gardeners, Foresters, and Farmers. 8vo, fig. Lond. 1840. A. Gust. Dahlbom. Monographia Chrysidum Suecice. 8vo, Lund. 1829.—Monographia Pompilorum Suecice. 8vo, Lond., Goth, 1829.—Bombi Scandinavice Monogra- phice tractati et icon, illustrati. 8vo, fig. col., Lond. Goth. 1832.—Prodromus Hymenopterologice Scandinavice. 8vo. Lond., 1833-36.— Clavis novi Hymenopterorum Systema- tis, &c. Ibid. 1835.—Conspectus Tenthredinidum, &c. 4to, Hafniae, 1835.—Examenhistorico naturale de Crabroni- bus Scandinavicis, &c. Lund. 1838.—Synopsis Hymen¬ opterologice Scandinavicce. 4to. Lond. 1839-40.—Dispo- sitio methodica speciorum Scandinavicarum pertinentium adfamilias Sphegidarum, Pompilidarum, Larridarum, &c. Ibid. 1842.—Hvmenoptera Europcea precipueborealia, &c. Lund. 1843-45. Charles Nouier, a literary writer and tourist in Scot¬ land, has given us Bibliographie Entomologique, ou Cata¬ logue raisonne des Ouvrages relatffs d VEntomologie et aux Insects, avec de Notes critiques et VExposition des Methodes. 12mo, Paris, 1801.—Examen critique des Lettres d Julie sur VEntomologie,par E. Mulsant. 8vo, Paris et Lyons, 1833. Thomas Say has added greatly to our knowledge of the insects of the Western World by numerous contributions to the American journals. These have been partially col¬ lected by a French author, under the title of (Euvres Ento- mologiques contenant tous les Memoires que M. Say a publics dans les Journaux Scientifiques des Etats- Unis sur VEntomo¬ logie e VAmerique du Nord, rec. et trad, par Gory. 8vo, Paris, 1837. Mr Say is also the author of American Ento¬ mology, or Descriptions of Insects of North America. 3 vols. 8vo, Philadelphia, 1824-28.—Explanation of terms used in Entomology. Philad. 1825.—Descriptions of new species of Heteropterous Hemiptera of North America. 8vo, New Harmony, 1831.—Curculionites of North America, with Observations on some of the species already knoivn. 8vo, Indiana, 1831.—Descriptions of new species of North American Insects, &c. 4to, 1833-36. 13 Biblio¬ graphy. ENTOMOLOGY. M. Solier is the author of various papers, chiefly on the Coleopterous tribes, in the Annals of the Entomological Society of France. 1835, et seq. C.W. Hahn. JconesadMonographiamCimicum. 12mo, Nurnb., 1826.—Die Wanzenartigen Insecten. 8vo, Nurnb.. 1813-35.—leones Orthopferorum. 4to, Nurnb., 1836. A. H. Halid ay. Hymenoptera Britannica. Oxyceraet Alysia. 2 vols. 8vo, Lond., 1839.—Many contributions to the Entomological Magazine, &c. Bektolotti. The History of the Flea, with Notes and Observations. 2d ed., 8vo, fig., Lond., 1834. A. Villa has published a catalogue of the duplicates of his own collection—a work of a useful kind in facilitating exchanges. Coleoptera Europce dupleta in collectione Vill^e. 8vo, Mediolani, 1833.—Alterum supplementum Coleoptero- rum Europce, sive additio ad catalogum, ct supplementum T. dupletorum coltectionis Vill^e, &c. 8vo, Mediol., 1838. Note su alcuni Tnsetti osservati nel periodo delV ecclisse del 8 Luglio, 1842. 12mo, Milano, 1842. W. J. Little. This assiduous collector has added greatly to our knowledge of the localities of Scottish Coleoptera, although we have no separate work by himself upon the subject. Ant. Longhi. Abitazione dei Coleotteri e dei mezzi acconci difarne caccia. 8vo, Milano, 1834. H. Lucas. Hist. Nat. des Lepidoptercs dEurope. 8vo, Paris, 1835.—Hist. Nat. des Lepidopteres etrangers. 8vo, fis. col., Ibid., 1835.—Des Papillons, ou Vade-mecum, des Lepidopterologistes. 8vo, fig., Paris, 1838. This author has also illustrated the entomology of the French posses¬ sions in Northern Africa, by figures and descriptions of many species of all the orders, in the third volume of the great work published by the government on the Explora¬ tion Scientifique de VAlgerie. Rudolph yon Jenison-Walworth. Die Insekten- Doubletten aus der Sammlung des. 8vo. Miinchen, 1834. —Beise durch Sad-Deutschland, u. Nord-Italien. 8vo, Ibid., 1835. Eb. Munck af Rosenschold. Prodromus faunce, Co- leopterorum Lundensis. 8vo, Praes., 1835. G. G. Kollar. De Cicindela Campestri. 4to, Get¬ ting., 1836. Gustave Silbermann. To this author we owe numer¬ ous excellent articles in the Revue Entomologique of Stras¬ bourg (1833 et seq.), a useful publication containing origi¬ nal essays, and descriptions of species, with critical and ex¬ planatory notices of recent entomological works, chiefly those of France and Germany. He has also written Enumeration des Entomologistes Vivants. 8vo, Paris, 1835. This is a work in which those whose names are now inscribed desire to be continued in future editions. Fr. Herold. Entwickelungsgeschichte der Schmetter- linge, Anatomisch, &c. 2 vols. 4to, fig., Kassel, 1815.— Von der Erzengung der Insecten. Folio, Frankf., 1834. M. Poey has written a work named Centurie des Lepi¬ dopteres de VIsle de Cuba. PI. col., Paris, 1834. J. G. Gebhardt. Die Schadlichen Feld, Wald u. Obstbaum Insecten, See. 8vo, Hanover, 1834. L. P. Cantener. Catalogue des Lepidopteres du Dip. du Var. 8vo, Paris, 1833.—Hist. Nat. des Papillons diurnes des Dep. du Haut et Bas Rhin, See. 8vo, Par. et Colm., 1835. M. Carrara. Sulla Fosforescenza della Lucciola com¬ mune {Lamp. Italic.). 8vo, Milano, 1836. Ioussaintde Charpentier. Verzeichni&sderEuropais- chen Schmetlerhnge in Besug auf Hubner's Schmetterlings- werh. Breslau, 1818.—See preceding notice of M. Char- pen tier’s Works, p. 13. W. de Haan. Memoire sur les Metamorphoses des Co- leopteres. 4to, Paris, 1836. - Bernard Deschamps. Recherches Microscopiques sur Vorganization des ailes des Lepidopteres. 8vo. Paris, 1835. Le Comte Dejean, a peer of France, and lieutenant- Biblio- general, now deceased, was one of the most noted collec- Ptrapby, tors of Coleoptera in modern times. He published the Ca- 'S—| talogue des Coleopteres de sa Collection. 3d ed., 8vo, Paris, 1837-38. This work is interesting as exhibiting the amount of species in each genus and as indicating their localities. Species generate des Coleopteres. 6 vols. in 7, 8vo, Paris, 1825-39.—Iconographie et Hist. Nat. des Coleoptires dEurope. 8vo, fig., 5 vols. 1829-40. In this work our author was aided by MM. Boisduval and Aube. The first four volumes contain the Carabiques, and consist of 46 fasci¬ culi, with 223 coloured plates. The fifth volume (by M. Aube) contains the Hydrocanthares, and is ccmposed of 10 fasciculi, with 41 coloured plates. A. De la Rue. Entomoloqie forestiere, Sac., See. 8vo, Paris, 1838. F. L. Delaporte De Castelnau. Etudes Entomolo- giques, Sec. 8vo, Paris, 1834-35.—Essai d'une classification deVordredes Hemipteres. 8vo, Paris.— Traite elementaire dEntomologie. 12mo, Paris, 1839. In union with Mr Gory, he has given us Hist.Nat.etlconog.desInsectes Coleoptires; 2 vols. 8 vo, Paris, 1835-40;—Monographic des Buprestides; 8vo, fig., col., Ibid., 1834; and—Monographic du genre Clytus; 8vo, fig., col., Ibid., 1835. To M. Delaporte we are also indebted for numerous papers in Guerin’s Mag. de Zoo- logie, the Ann. de la Soc. Ent., and Silbermann’s Revue. L. Gory has contributed largely to entomology in Guerin’s Magazine de Zoologie, and, in conjunction with M. Dela¬ porte, is the author of Monographie des Buprestides. Paris, 1834. With that observer he has also executed a Mono¬ graphie des Genres Clytus, and the Hist. Nat. et Iconog. des Insectes Coleopteres, 2 vols. 8vo, Paris, 1840 ; while with M. Percheron he has published a Monographie des Cetoines et genres voisins. See., Paris, 1833-36. A. R. Percheron. Besides the works above alluded to, this author has executed a Monographie des Passales, et des genres qui en ont etc separes. 8vo, Paris, 1835. He has contributed to Guerin’s Mag. de Zool., and is joined with that writer in his Genera des Insectes. 8vo, Paris, 1831-35. He has also written Bibliographic Entomolo¬ gique. 2 vols. 8vo, Paris and London, 1837. J. Th. Lacordaire. Essai sur les Coleopteres de la Guyane Francois, Nouv. Ann. des Trans. Tom. ii., p. 35. —Introduction a I’/tude dEntomologie, &c. 2 vols. 8vo, fig., Paris, 1834-37.—Monographie des Erotyliens. 8vo, Paris, 1842.—Revision de la famille des Cicindelides. 8vo, Liege, 1842.—Monographie des Coleopteres subpentameres de la famille des Phytophages. In the Mem. de la Soc. Royale de Liege. Tom. iii. v., Brux., 1845. These volumes have since been published apart. They contain descriptions of the species of Crioceris, Lema, Sagra, Donacia, Megalopus, Clythra, Chlamys, Lamprosoma, and allied genera. It is almost appalling to the entomologist to consider the dimen¬ sions to which a descriptive catalogue of even the phyto¬ phagous coleoptera must extend when completed. M. Lacordaire has made many more special contributions to our science, and is the joint author (with M. Boisduval) of the Faune Entomologique des Environs de Paris. 1 vol. 18mo, Paris, 1835. But perhaps the most important of our present author’s works is his general one, the Histoire des Insectes, nowpublishing in the Nouvelles Suites a Buffon. The first two volumes have appeared. The work professes to be an “ Expose methodique et critique de tous les genres proposes jusque ici.” He gives the characters of each genus, and appends a list of all the species yet described. This work is of great value, not only for classification anil cha¬ racters, but for general information on all that the author touches. He professes to make the entomological world aware of what is really known up to the present time,—a bold and ambitious attempt, but as likely to prove successful in the hands of M. Lacordaire as in those of any other. ibl apl w ENTOMOLOGY. 19 blio- J. C. Cheng. This author is now (1855) carrying on an iphy. Encyclopedic d'IIistoire Naturelle, which, like others under that name, is necessarily a compilation. It already contains two volumes on Coleopterous insects, and the like number upon the Lepidopterous order. Each volume contains many hundred figures (woodcuts), with a representation of almost every genus. The different departments of the work may be had separately, and are remarkable for the smallness of their cost. Max. de Chaudoir. Tableau dune nouvelle subdivi¬ sion du qenre Feronia, Dejean, sulci dune caracteristique de trois nouveaux genres de Carabiques. Bull. Mosc. Rev. Zook, 1839, p. 26.—Genres nouveaux, et especes nouvelles des Coleopteres de lafamille des Carabiques. Ibid. p. 27. —Enumeration of the Carabidce and IJydrocantharidce of the Caucasus. Kiew, 1846. Gaubil. Quelques Carabiques nouveaux pour la Faune de la France et de nos possessions dAlgerie. Rev. Zook, 1844.—Catalogue synonymique de Coleoptcres dEurope et dAlgerie. 8vo, Paris, 1850. M. Agdinet-Serville, a labourer in the entomological portions of the Faune Frane-aise, and of the Encyclopedic Methodique, published the last fasciculus of the work by the late Palisot de Beauvois, on the Insectes recueillis en Afrique et en Amerique, already mentioned. He is also the author of a Nouvelle Classification de la Famille des Longicornes, in the Annales de la Societe Entomologique de France, 1833-4.— Tableau Methodique des Insectes de Vordre des Orthoptires. 8vo, Paris, 1831.—Insectes Coleopteres. 8vo, Ibid. 1831.—Sur une Lettre de Westermann, sur les Mceurs dlnsectes des Indes Orientales et du Cap de Bonne Espe- rance. 8vo, Paris.—Revue Methodique des Insectes Or- thopteres. Ann. Sc. Nat., xxii.—Hist. Nat. des Insectes Orthopteres. 8vo, Paris, 1839.—With M. Amyot, In¬ sectes Ilemipteres, in Suites d Buffon. H. M. Asmuss. Monstrositates Coleopterorum. Rigae, 1835. A. Chevrolat. Coleopteres de Mexique. 8vo, Strasb. 1834.—Coleopteres de Syrie. 8vo, Paris, 1854. To this author we also stand indebted for numerous articles in Gue¬ rin’s Mag. de Zool., and Silbermann’s Revue Entom. Ch. Aube. Considerations sur la Gale, et VTnsecte qui laproduit. 8vo, Paris, 1836.—Monographia Pselaphiorum, cum Synonymid extricata. 8vo, fig., Paris, 1834. M. Aube is also the author of that portion of Comte Dejean’s Species g neral des Coleopteres, which relates to the Hydro- cantheres et Gyrinites. 1 vol. 8vo, Paris, 1838 ; as well as of the 5th volume of Dejean and Boisduval's Iconogra- phie des Coleopteres dfEurope. 8vo, Paris, 1836. Steph. Auboin. Entomologie, ou Traite des Insectes. 2 vols. 18mo, Paris, 1831. George Robert Gray has contributed largely to many departments of natural history, and described numerous new insects of all orders in Griffith’s translation of Cuvier’s Ani¬ mal Kingdom, 8vo, 1829. We have also from the same author Descriptions and figures of some new Lepidopterous Insects, chiefly from Nepaul. 8vo, ph, 1846.— The Ento¬ mology of Australia, in a series of Monographs. Part 1st fPhasma), 4to, London, 1833.—Synopsis of Insects belong¬ ing to the Family of Phasmidce. 8vo, Bond. 1835. Mr Gray has more recently published a very handsome volume on thePapilionidae of the British Museum, w ith many figures of new species. This forms one of the series of Catalogues by his brother, Dr John Edward Gray (whose varied and valuable works on natural history we do not here name, as they belong to other departments of the science), prepared by direction of the trustees. Adam White, zoologist attached to the British Museum, has contributed largely to various departments of natural history. We shall here name—Nomenclature of Coleop¬ terous Insects in the British Museum {Cetoniadaf). Lond. 1847.—Nomenclature of Coleopterous Insects in do. (IIy- drocanthari). Ibid. 1847.—Nomenclature of Coleopterous Insects in do. [Buprestidee). Ibid. 1848.—Nomenclature of Coleopterous Insects (Cleridaf), with descriptions of 28 unrecorded species. Ibid. 1849.—Catalogue of Longicorn Coleoptera, with descriptions of apparently unnoticed spe¬ cies in the British Museum. Part 1, figures. Mr Adam White has moreover contributed many excellent special articles to Maunder’s Treasury of Natural History, 8vo, Lond. 1849 (3d edit., ibid. 1854), and has added to our knowledge of new species in the appendix to Captain Grey’s Western Australia, Lond. 1841 ; and in those of Eyre’s Central Australia, Ibid. 1845 ; of the Voyage of H.M.SS. Erebus and Terror, Ibid. 1846; of Dieffenbach’s New Zealand; of Stokes’s Discoveries in Australia, Ibid. 1846 ; of Macgillivray’s Voyage of H.M.S. Rattlesnake, Ibid. 1852. He has figured and described Longicorn Beetles, in the illustrated Proceedings of the Zoological Society. An ample and accurate list of his writings will be found in Agassiz and Strickland’s Bibliographia Zoologica, vol. iv. p. 557. Francis Walker was the principal editor of the Ento¬ mological Magazine, 5 vols. 8vo, London, 1833—37, and has contributed many papers to that work, and also to the Ann. and Mag. of Natural History, and other periodicals. Of separate works he has published—Monographia Chal- ciditum. 2 vols. 8vo, London, 1839.—Insecta Saunder- siana. Two parts of this work are devoted by Mr Walker to the description of Diptera in the collection of Mr W. Wilson Saunders.—British Diptera (in the Insecta Bri- tannica). Of this work two volumes have appeared, and a third is (1855) in the press.—Catalogue of Neuroptera in British Museum. 4 parts, Lond. 1853. (We may here note that the majority of the catalogues now referred to contain descriptions of numerous new species.)—Lepidop- tera Heterocera. 2 vols. Lond. This work contains the new species in the collection of the British Museum.— Cata¬ logue of Homoptera in the British Museum. 4 parts, with figures, Lond. 1851. W. S. D allas. Catalogue of Coreidce in the British Mu¬ seum. Lond.—Catalogue of Scutelleridce and Pentame- ridce in the British Museum, with figures, Lond. 1851. F. Smith. To this accurate observer we also owe some excellent catalogues of the entomological contents of the Bri¬ tish Museum. Of the extensive and difficult family of Bees we have—Part I., The Andrenidce ; Part II., The Apidce; with descriptions of many newr species, and illustrated by outline figures of the genera, with details.—Catalogue of the Hymenopterous Insects of the families Mutillidce and Pompilidce, describing many new species in the Museum collection.—Monograph of the British Bees, illustrated with plates. This work also forms a portion of the great series of Museum catalogues now in course of publication by Dr Gray, the keeper of the zoological department. Mr Smith has contributed many papers to the Zoologist, and the Ann. and Mag. of Nat. Hist. Edwabd Doubleday. This author, whose decease we have now to mourn, had acquired a remarkable knowledge of insects of the Lepidopterous order. Pie contributed largely to the Entomological Magazine, and other scientific periodicals, and described the Lepidoptera in the volumes which Stokes and Eyre have respectively devoted to the narrative of their Discoveries in Australia, as well as the insects of the same order in the appendix to Dieffenbach’s New Zealand. Pie formed the published Catalogue of the Lepidopterous Insects in the British Museum. Part L, 1844; Part II., 1847. In union with Mr Hewitson, he was the author of The Genera of Butterflies, or Diurnal Lepidoptera ; comprising their generic characters, a notice of their habits and transformations, and a Catalogue of the species of each genus. Illustrated with 86 coloured plates Biblio¬ graphy 20 Biblio¬ graphy. ENTOMOLOGY. from drawings by C. Hewitson. 2 vols. imperial 4to. Lond. 1846-49. In this admirably illustrated work Mr Westwood was also a collaborateur. Henry Doubleday. List of British Lepidoptera. 8vo, Lond. 1847. H. Burmeister. Be Insectorum systemate naturalu Hallse, 1829.—Handbuch der Entomologie. 4 vols., Ber¬ lin, 1832-47. The general portion {Algem. Entomoli) of this invaluable work has been translated by Mr Shuckard under the title of A Manual of Entomology. 8vo, Lond. 1836. Of the other volumes, one is devoted to Hemiptera, another to Neuroptera and Orthoptera, and the others to the Lamellicorn Coleoptera.— Genera Insectorum, iconibus illustravit et descripsit. 8vo, Berol. 1838—46. Bemer- kungen uber den allgemeinen Bau und die Geschlechtsun- terschiede bei den Arten der Gattung Scolia. Mit. 1 tafel. 4to, Halle, 1854.— Uebersicht der Brazilianischen Mutillen. 4to, Ibid. 1854.—Entersuchungen uber die Flvgeltypen der Coleopteren. Ibid. 1854. W. E. Shuckard has made the following contributions to entomology :—Essay on the indigenous fossorial IIy~ menoptera, comprising a description of all the British species of Burrowing Sand-Wasps contained in the Metropolitan Collections. ‘ %vo,Cox\&A%?>'l.—Elements of British Ento¬ mology, containing a general introduction to the Science, &c. 8vo, Lond. 1839.—The British Coleoptera delineated (with 94 plates by W. J. Spry). 8vo, Lond. 1840. On the habits of the Aculeate Hymenoptera : Trans, of Ent. Society, i. p. 52. Besides being the author of many other descriptive papers in various scientific journals, he has contri¬ buted an essay on the Progress and Prospects of Entomo¬ logy to the 29th No. of the For. Quar. Eev. In conjunction with Mr Swainson, he is the author of a volume on The Na¬ tural History and Arrangement of Insects in Dr Lardner’s Cyclopcedia (Lond. 1840), and to him we also stand indebted for a translation (as above mentioned) from the German of Burmeister’s Manual of Entomology. 8vo, 1836. W. O. Westwood, a skilful entomologist and accurate draftsman, whose writings and illustrations are voluminous and of great value. Referring to the 4th vol., p. 549, of the Bibliographia Zoologica, for a list of his separate papers in the Trans, of the Entom. Society, and the Ann. and Mag. of Nat. Hist., we shall here confine ourselves to the indica¬ tion of his principal works:—Address on the recent pro¬ gress and Present State of Entomology. 8vo, Lond. 1835. —Catalogue of Hemiptera in the Collection of the Rev. F. W. Hope. 8vo, Lond. 1837.— The Entomologists Tejct- Book. 8vo, fig., Lond. 1838.—An Introduction to the Modern Classification of Insects, founded on the Natural Habits and corresponding organisation of the different Families. 2 vols. 8vo, fig., Lond. 1839—40.—British Butterflies and their transformations exhibited in a series of 42 coloured plates, by H. N. Humphreys. Demy 4to, London, 1841.—British Moths and their transformations, arranged and illustrated in a series of plates, by H. N. Humphreys. Demy 4to, London, 1843-45.— Cabinet of Oriental Entomology. 4to, London. In this work many of the more showy insects of India and the Asiatic Islands are figured and described.—Arcana Entomologica, or Il¬ lustrations of new, rare, and interesting Exotic Insects. 8vo, fig., Lond. 1841-42. Mr Westwood was connected editorially with the republication of Drury’s Illustrations of Exotic Entomology (3 vols. 4to, Lond. 1837,) and has added notes and systematic names. He recently commu¬ nicated a paper, entitled Contributions to Fossil Entomo- logy, to the Trans, of the Geological Society, London, 1854. Fortier. Observations sur le Puceron lanigere. 12mo, 1835. Fr. Faldermann. Coleopterorum ab ill. Bungio in China bor., Mongolia, &c., Missorum lllustrationes. 4to, fig. Petrop. 1835.—Fauna Entomologica Trans. Caucassia. 2 vols., 4to, fig., Mosqu. 1836-37. James Wilson. A Treatise on Insects, general and systematic, being the Article Entomology’' from the 1th Edition of the Encyclopcedia Britannica. 4to, with plates, Edin. 1835. The same author (in conjunction with Mr Duncan) has published Entomologia Edinensis, or a de¬ scription of the Insects found in the neighbourhood of Edin¬ burgh. (Coleoptera.) Edin. 1834. James Duncan. In addition to his aid in the work last named, this author has contributed the following volumes (published in 1834-42) to Sir William Jardine’s Naturalist’s Library. Introduction to Entomology ; comprehending a general view of the metamorphoses, external structure, ana¬ tomy, physiology, and systematic arrangement of all classes of Insects, with 38 coloured plates.— The Natural History of Coleopterous Insects, with 32 coloured plates.— The Na¬ tural History of British Butterflies, with 36 coloured plates. —British Moths and Sphynxes, with 32 coloured plates.— Foreign Butterflies, with 33 coloured plates.—Exotic Moths, with 34 coloured plates. B. A. Carlson. Prodromus Hymenopterologice Scan- dinavice. 8vo, Lundse, 1836. C. A. A. Buhle. Raupen-u. Schmetterlmgskalender der Beutschen Falter. 4to, Leipz. 1837.—Bie Tag-u. Abendschmetterlinge Europas. 4to, Ibid. 1837. J. D. Labram. Insecten der Schweiz. 2 vols., fig. col., Basel, 1836-38. — Singulorum Generum Curculionidum leones. 8vo, Ibid. 1842-50.—The latter is conjointly with M. ImhofF. C. Wesmael. This author’s contributions to entomology are to be found chiefly in the Bulletins des Sciences de VAcad. royale de Bruxelles. Of his separate works we may name the following:—Monographic des Braconides de la Belgique. 3 vols. 4to, fig., Brux. 1835-37.—Monographie des Odyneres de la Belgique. 8vo, fig., Ibid. 1835.—Revue critique des Hymenopteres fouisseurs de Belgique. 8vo, Bruxelles, 1851-52. Osw. Heer. Geographische Verbreitung der Kafer in den Schweizeralpen. 8vo, Zurich. 1834.—Observationes Entomologicce continentes Metamorphoses Coleopterorum nonnullorum adhuc incognitas. 8vo, fig., Tur. 1836.— Fauna Coleopterorum Helvetica. P. 1, 8vo, Tur. 1838.— Bie Kafer der Schweiz, mit besond. Beruchsichtig. Hirer geograph. Verbreitung zusammengestellt. 3 vols. 4to, Neuchatel, 1839-41.— Ueber Verbreitung und Vertilgung der Laubkafer und Inger. 8vo, Zurich, 1843.— Ueber die Haus-Ameise Madeira’s. 4to, Zurich, 1852. F. W. Hope, a noted English collector, whose entomo¬ logical museum was one of the largest in Britain. We be¬ lieve it has now been consigned to the University of Oxford. Mr Hope has published—Bescription of the Buprestidce (in his own collection). 8vo, Lond. 1836.—A Catalogue of Hemiptera (in his own collection) with short Latin de¬ scriptions of the new species. 8vo, Lond. 1837.— The Coleopterist"s Manual, Part L, containing the Lamellicorn Insects of Linnaeus and Fabricius. 8vo, pi., Lond. 1837. The same, Part II., containing the predaceous Land and Water Beetles of Linn, and Fab. 8vo, pi., Ibid. 1838-45.— The same, Part III., Various Beetles. 8vo, pi., Ibid. J 841. E. Heeger. Beitrage zur Schmetterlingskunde oder Abbildung und Beschreibung neuer Sicilianischer Schmet- terlinge. 4to, fig., Wien, 1838.—Beitrage zur Natur- geschichte der Insecten. 12 Parts, Royal 8vo, Vien. 1854. M. H. Dupont. Monographie des Trachyderides de la famille des Longicornes. 8vo, fig., Paris, 1839. This ob¬ server has described many fine insects in Guerin’s Mag. de Zool., for the years 1832-33.—Beitrage zur Naturgeschichte der Insecten. 10 Fortsetzung. Mit 6 tafeln. 8vo, Wien, 1853. E. Menetries. Catalogue d’Insectes recueillis entre Biblio¬ graphy. E N T O M o- Constantinople et le Balkan. 4to, fig., Peterb. 1838.— iy- Essai dune Monographic du genre Anacolus. 4to, Ibid. 1839.—Descriptions des Insectes recueillis par feu M. Lehmann. 4to, Ibid. 1848. By the same author, we have other papers in the Mem. Acad. Peterb., &c. J. F. Menetries. Catalogue de quelques T^cpidoptercs des Antilles; avec la description de plusieurs especes nou- velles. 4to, Moscou, 1833. L. Altmann. Abriss der Entomologie. 8vo, Leipz. 1837.—Die nxdzlichen u. schadlichen Forstknfer fiir Forst- beamts. 8vo, Dessau, 1844. Joh. Gistl. Enumeratio Coleopterorum agri Mona- censis. 8vo, 1831.—Systerna Insectorum secundum classes, or dines, &e. Tom. I., Coleoptera, Fascic. 1st, Mantichora —Dromica. 1837. Fascic. 2d, Cicindela-Cymindis. 1840.— Die Entomolgen Europas. Munch. 1834.—Hemipteren ■and Orthopteren Fauna der Schweiz. 1838.—Lexi¬ con der Entomologischen Welt, der carcinologischen u. arachnologischen, Addressbuch der lebenden Entomologen u. Entomophilen, &c. 8vo, Stuttgart, 1847. C. F. Freyer. Beitrcigezur gesch. Europdischer Schmet- tertinge. Nurnb. 1828-31.—Neuere BeitrdgezurSchmet- terlingskunde. 4to, Augsb. 1831-46.—Die Schadlichsten Schmetterlinqe Deutschlands, fiir Eorstmdnner, &c. 8vo, Ibid. 1839. Ant. Cornolli. De Coleopteris novis ac rarioribus minusve cognitis, Provincice Novocomensis. Ticini Reg., 8vo, 1837. Chanoine d’Avriixy. Du Myzoxile, Puceron lanigere. 8vo, fig., Louviers, 1834. F. M. G. re Tigny (and Alex. Brongniart). Histoire Naturelle des Insectes, redigee suivant les methodes d’ Olivier. 10 vols. 18mo, Paris, 1799-1832. There is an edition by Guerin, Paris, 1828, and also an Italian translation, 3 vols. 8vo, Livorno, 1835. P. Congliani. Remarques sur la Faune Entomolo- gique des environs de Reggio. Esercit. Acc. 1839. C. F. Constant. Hist. Nat. des Papillons. 16mo, fig., Paris, 1839. Henry Denny. Monographia Pselaphidorum et Scyd- mcenidarum Britannice. 8vo, fig., Norwich, 1825.—Mono¬ graphia Anoplurorum Britannice, &c. 8vo, fig., Lond., 1841-42. Deyillers. To this author (conjointly with M. Guenee) we owe Tableaux Synoptique des Lepidopteres diEurope, contenant la. description de tous les Lepidopteres connus jusqu!d ce jour. 4to, Paris, 1835. Guil. Feed. Erichsen. Genera Dytiscorum. 8vo, Berol. 1832.—Die Kdfer der Mark Brandenburgh. 8vo, Berlin, 1837-39.— Genera et species Staphylinorum Insec¬ torum Coleopterorum familice. 8vo, Berol. 1839-40.— Naturgeschichte der Insecten Deutschlands. 8vo, Berlin, 1845.—Entomographien Entersuchungen in d. Gebiete d. Entomologie, m. besonderer Benutzung d. Konigl. Samm- lung zu Berlin, 1840.—Bericht uber d. wissenschaftl. Zeistungen im Gebiete d. Entomologie. 9 Jahrgg. wahrend d. Jahres 1838-47. Berlin, 1840-1848. Erichsen is the author of many entomological essays in various Continental periodicals. He has also described the insects of British Guiana in the third volume of Richard Schomburgh’s Reise, and those of Peru in Wiegmann’s Archiv. His writings are of great value, and his untimely death was an irreparable loss to the science which he so assiduously and successfully cultivated. Ed. Eversmann. Libellulince inter Wolgam et Montes Uralenses. 8vo, Mosquse, 1836.—Fauna Lepidopterorum Volgo-Uralensis exhibens Lepidopterorum species quas per vigenti quinque annos in Provinciis Volgam jluvium inter et monies Uralenses sitis observavit et descripsit. 8vo, Casani, 1844. Fel. Dujardin. The only separate work of this frequent O L O G Y. 21 contributor to the Ann. des Sciences Nat., &c. with which Biblio- we are acquainted, is his Promenades d'un Naturaliste— gr^phy. Insectes.—Entretiensfamiliares, &c. 18mo, fig. Paris, 1838. Lucien Buquet. To this author we owe many contri¬ butions to the Ann. de la Soc. Ent. and other periodicals. Rev. Zool. 1838-40. G. R. Waterhouse has contributed many papers on Insects to the Trans, of the Entom. Society (1840-41), the Ann. and Mag. of Nat. Hist., and other works. W. C. Hewitson. To this author (well known for his work on the Eggs of British Birds) we owe several entomo¬ logical papers in the scientific periodicals, and he has pub¬ lished many Fasciculi of Exotic Butterflies, being illus¬ trations of new species, selected chiefly from the collections of W. Wilson Saunders and W. C. Hewitson. 4to, Lond. 1851-54. In this work he figures and describes entire groups, especially of the diurnal Lepidoptera of South America. He was conjoined with Mr Doubleday in his beautiful Genera of Diurnal Lepidoptera. 2 vols. Lond. 1846-49. Edward Newman is the author of numerous special pa¬ pers on entomological subjects. These have appeared chiefly in the 2d series of the Magazine of Nat. Hist., in the Entomological Magazine, the Entomologist, and the Zoologist, of which last two periodicals he was the conduc¬ tor. His separate works on Insects are Sphynx Vespiformis, an Essay. 8vo, Lond. 1832. A second edition was pub¬ lished us der the title of System of Nature. 8vo, Lond. 1843.— The Grammar of Entomology. 12mo, Lond. 1835. —A Familiar Introduction to the History of Insects. 8vo, 1841.—Proposed Division of Neuroptera into two classes. 8vo, Lond. 1853. G. A. W. Herrich-Schaeffer. De Generatione In¬ sectorum, &c. Fig. Ratisb. 1821.—Nomenclator Entomo- logicus, &c. 8vo, Regensb. 1835-1840.—Die Wanzenar- tigen Insecten. 8vo, Nurnb. 1836-46. This work now consists of several volumes, and every species described is also figured.—Systemat. Bearbeitung der Schmetterlinge von Europa, als Text, Revision, und Supplement, zu J. Hubners Sammlung Europdischer Schmetterlinge. 5 vols. 4to, Regensb. 1843-45.—Index alphabetico-synonymicus insectorum hemipterorum heteropterorum. Alphabetisch- synonymisches Verzeichniss der wdnzenartigen Insecten. 8vo, Regensburg, 1853.—Lepidopterorum exoticorum spe¬ cies novce aut minus cognitce. Collection de nouvelles especes de papillons exotiques, Serie 1, Livraisons 1—17. 4to, Re¬ gensburg, 1855. Our present author, as already noted, is the continuator of Panzer’s Deutschland Insecten. George Newport. We have not many works of this author published apart, but he has of late years made some valuable additions to our knowledge of the physiology of Insects. These are to be found chiefly in the Proceedings and Transactions of the Royal, Linnaean, and Entomolo¬ gical Societies of London. His separate publications are,— Observations on the Anatomy, Habits, and Economy of Athalia centifolia, the Saw-fly of the Turnip, and on the means of preventing its ravages. 8vo, Lond. 1838.—An Ad¬ dress delivered at the Anniversary Meeting of the Entomolo¬ gical Society. 8vo, Lond. 1844.—An Address delivered at the adjourned Anniversary Meeting of the Entomological So¬ ciety. 8vo. Lond. 1845.—Mr Newport has, moreover, con¬ tributed the article Insecta to Todd’s Cyclopcedia of Ana¬ tomy and Physiology. Vol. iv. pp. 853-994. Nic. Contarini. Memoria sopra una nuova specie di Cecidomia, ed alcuni Osservazione sopra quella del! spe- rico. 4to, fig. Venez. 1840.—Cataloghi degli Uccelli e degli Insetti di Padoua e Venezia. 4to, Bassona, 1843.— Discorso sulV utilitd dello Studio degli Insetti. Atti de Aten. Venez. ii. p. 3. Balthasar E. de Romaud. Tableau de Vaile supe- rieuse des Hymenopteres. 4to, Paris, 1839. E. Mulsant. Lettres ct Julie sur VEntomologique (en 22 E N T O M Biblio- prose et en vers) suivies d'une description methodique de la graphy. plus grandepartie des Insectes de France, ornee de lo pi. 2 vol>. 8vo, Lvon, 1830-31.— Cours d'Entomologie,reduit en tableaux synoptiques; d Vusage des Ecoles. 8vo, Lyon, lg33.—Histoire Naturelle des Coleopteres de France: lre Partie, Longicornes. 8vo, 3 pi., Lyon, 1839. La meme, 2e Partie, Lamellicornes. 8vo, pi., Lyon, 1842. La meme, 3e Partie, Palpicornes. 8vo, Lyon, 1843.—Securipa/pes de France. 1 vol. 8vo, Paris, 1842.—Hist. Nat. des Col'op- teres de France: Sulcicoles R curvipalpes. 8vo, Paris, 1846.— Opuscules Entomologiques. 1-4 cahiers, 8vo, Paris, 1853. M. Mulsant has moreover recently published a Monograph of the Coccinellidce. It appeared originally in the Annul, des Sciences Physiques, &c., of Lyons. H. A. Hagen. Synonymia Libellulorum Europceorum. 8vo, Kcenigsb. 1840. Em. Blanchard. Histoire des Insectes (Suite a Buffon —Dumeril), III. Orthopt. Neuropt. Hemipt. Hymenopt. Lepidopt. et Dipt. Paris, 1840.—Hist. Nat. des Insectes, traitant de leurs maurs, Sic. 8vo, Paris, 1845. With MM. Hombron and Jacquinot, M. Blanchard has described and figured many insects from Australia and the Asiatic islands in D’Urville’s Voyage a la Pole Sud.— Catalogue of In¬ sects in the Paris Museum. Adr. Antelme. Hist. Nat. des Insectes et des Mol- Itisques. 2 vols. 8vo, Paris, 1841. Herm. Sciiaum has published Symbolce ad Monogra- phiam Scydmcenorum ; Dis. Inaug. 8vo, fig., Halis, 1841. —Analecta Entomologica. 8vo, Halis Sax., 1841.— Ver- zeichniss der Lamellicornia Melitophila. Stettin, 1848.— Pericht iiber die Wissenschaftlichen Leistungen im Gebiete der Entomologie wdhrend des Jahres 1848. 8vo, Berlin, 1850.—The same for 1849. Berlin, 1850.—The same for 1850. Berlin, 1852.—The same for 1851. Berlin, 1853.— The same for 1852. Berlin, 1854. H. R. Humphreys. This author, conjointly with Mr Westwood, has published on British Butterflies and their Transformations. 1 vol. 4to, col. pi., London, 1841 ; and on British Moths. 2 vols. 4to, Ibid. 1843-45. Selys de Longchamps has, among other works, pub¬ lished the following: Catalogue des Lepidopteres et Tab¬ leau des Libellulines de la Belgiques. 8vo, Liege, 1837.— Monographic des LibelluJidees d’Europe. 8vo, Paris, 1840.—Enumeration des Insectes L‘'pidopteres de la Bel¬ gique. In Mem. de VAcad. de Liege, 111.—Revision of the British Libellulidee. In Ann. Mag. of Nat. Hist, xviii. p. 217.—Lisle de Libellules dlEurope et diagnose de quaire especes nouvelles. In Rev. Zool., 1848. John Walton has contributed several papers, chiefly on the Curculionidce, to the Ann. Mag. of Nat. Hist., &c. J. S. Bowerbank. We owe to this author observations on the circulation of the blood in insects, and other papers in the Entomological Magazine, &c. He is an excellent microscopical observer. James Hardy. This pains-taking and accurate observer has contributed t@ the Proceedings of the Berwickshire ]Saturalists> Club, and (with Mr Bold) has published a Catalogue of the Insects of Tyneside and Durham. Trans, of Tyneside Nat. Field-Club, i. 37. F. Isnardi. Stona del Papilio Jasius, e della Seta che sipiu ticavare del suo Baso. 4to, fig., Genova, 1840. I. W. Harris. Report on the Insects of Massachusetts injurious to Vegetation. 8vo, Camb. U.S., 1841-2.—Va¬ rious papers in Silliman’s Journal, &c.—Conjointly with Le Conte, Dr Harris has described the insects in Agassiz’s work on Lake Superior. Boston, 1850. He has written A Ireatise on some of the Insects of ]Sew England which are injurious to Vegetation. 8vo, Boston, 1852. Boyer de Foscolombe. Des Insectes Nuisiblesa I Agri¬ culture. 8vo, fig., Aix, 1840. He has contributed various papers to the Annales de la Soc. Ent. O L O G Y. T. Victor. Insectes du Caucase (Bulletin de Mosc., 1840).—Coleopteres du Caucase (Ibid). Fr. Berge. Schmetterlingsbuch od. Naturgesch. der Schmetterlinge, mit 1100 ilium, abbildgn, gr. 4to, Stutt¬ gart, 1842.—Kaferbuch Naturgesch. der Kafer, mit 1315 ilium, abbildgn. 4to, Stuttgart, 1844.—Insetti osservati nel periodo delV eclisse del 8 Luglio, 1842. 12mo, Milano, 1842. —Catalogo dei Coleopteri della Lombardia. 8vo, Milano, 1844. J. J. Bourasse. Esquisses Entomoloqiques. 12mo, Tours, 1842-44. F. De Breme. Monographic de quelques genres Cole¬ opteres, Heteromeres, appurtenant a la tribu des Blapsides. 12mo, fig., Paris, 1842.—Essai monog. et iconog. de la tribu des Cossyphides. 8vo, pi. col., Paris, 1842. C. R. Wulff. De Fabrica corporis Iusectorum Diss. 8vo, Lundae, 1842. M. T. Boitard. Manuel d?Entomologie, ou Hist. Nat. des Insectes. 2 vols. 18mo, Paris, 1843. Chr. Keferstein. To this author we owe various articles in Silberman’s Revue Entomologique. L’Abbe Bourlet. Mem. sur les Podurelles. 8vo, Douai, 1843. Bibli 3! graph t Fr. Goldfuss. Symbolce ad Orthopterorum quorun- dam aconomiam. Bonn, 1843. P. Joravko. Quelques remarques sur Varticle du tarse des Hymenopteres, et Mannerheim, sur la r'colte dfinsectes Coleopteresfaite 1843. (Bulletin de Mosc.) J. H. Kaltenbach. Monographic d. Familien d. Pflanzenlause, Aphidina et Hyponomentes. Aachen, 1843. G. Th. Schneider. Monographia generis Raphidice Linncei. Vratisl. 1843. Cam. Rondani. Memorie per servire alia Ditterologia Italiana. Tom. i.-iii., 8vo, Parma, 1840-1. — Sopra una Specie di Insetto Diptera ; Mem. prima per servire alia Ditterologia Italiana. 8vo, Parma, 1840.—Sopra alcuni nuovi generi di Insetti Ditteri. 8vo, Parma, 1840. —Progetto di una classificazione in famiglie degli Insetti Ditteri Europei. 8vo, Parma, 1841.— Osservazioni sopra alcuni larve di Ditteri viventi nel gambo dei cereali. 8vo, Parma, 1843.— Quattre specie di Insetti proposti come tipi di generi nuoci. 8vo, Bologna, 1843.—Ferdinandea, genere nuovo dei Ditteri. 8vo, Bologna, 1844. Ludov. Redtenbacher. Illustrutiones et descriptiones Coleopterorum novorum Syrice.—8vo, Stuttgart, 1843.— Fauna Austriaca. Wien, 1849. Reyssier (de Villefranche). Destruction des Pyrales, des Chenilles, et de toute espece d'Disectes. 8vo, Ville¬ franche, 1844. G. D. Badham. The question concerning the sensi¬ bility, intelligence, and instinctive actions of Insects. 8vo, Paris, 1837.—Insect Life. 8vo, Lond. 1845.—Epi¬ sodes of Insect Life. By Acheta Domestica, M.E.S.; 3 vols. 8vo, London, 1849, et seq. The last-named work, though under a fictitious name, exhibits an ample share of the author’s lively and accurate manner of narration. It is elegantly got up in respect to pictorial adornment, and conveys a great deal of useful information in a pleasant form, combining the popular and the truthful, in a way but seldom manifested in zoological lucubrations. P. D. Brodie. History of the Fossil Insects in the Secondary Rocks of England, fyc. 8vo, Lond. 1845. Giordani.' Nuova Biggatiera appropriata alia 4 e 5 Eta dei bachi da seta. Padova, 1845. Bomati. Metodo di educare i bachi da seta. Milano, 1845. Saccardo. Scoperta delle cause che producono il caldno o mol del segno nei bachi da seta. 8vo, Padova, 1845. Frid. A. Kolenati. Meletemata entomologica. 8vo, St Petersburg, 1845. E N T O M o* Tramontini. Nuoco metodo di mantenere i bachi da ■Y' seta nella prima eta colla foglia secca. Milano, 1845. ^ Antonio Broglia. Metodo pratico di coltivari i bachi. Verona, 1845. Kirchbaumer. Ueber die Cerambycinen um Munchen. 8vo, Munchen, 1845. H. M. Schmidt-Gobel. Faunula Coleopterorum Birmanece adj. nonnullis Bengalice indigenis. 1 Bd., 4to, Prag. 1846. Chaudoir et Hochhuth. Enumeration des Cara- biques et Hydrocanthares recueillis pendant un voyage au Caucase. Kiew, 1846. B. G. Gimmerthal. 12 neue Dipteren beschr. Riga, 1847.—Erster Beilrag zu einer kwftigen Dipterologie Busslands, et V. de Motschoulsky, observations sur le musee entomol. de Moscou. (Bulletin de Mosc.) W. Dickore. Versuch eines Verzeichniss d. Schmet- terlinge in d. Gegend v. Giessen. Giess. 1849. J. C. Schiodte. Specimen founce subterranece. Kopenh. 1849. Franz. Joserii Macbrer. Enumeratio Coleopterorum circa Heidelhergum indigenarum adjectis synonymis lo- cisque natalibus. 8vo, Heidelbergae, 1850. Arnoed Forster. Hymenopterologische Studien. 1 heft, Formicaries, 4to, Aachen, 1850. G. Grundler. Dissertatio de Parasitis Hominis. 8vo, Berlin, 1850. A costing Bassi. II fatto parlante sul modo di hen governore i bachi da seta, e prevenire e curare il calcino, fyc. 8vo, Lodi, 1850. Christian Brittinger. Die Libelluliden der Kaiser- eiches Osterreich. 8vo, Wien, 1850. Luigi Patellini. Osservazione zootomicoJisiologiche sul Baco da Seta. 8vo, Milano, 1851. Care. H. Boheman has published Novce Coleopterorum species descriptce. N. Mem. Nat. Moscou, i., p. 101.— Caladromus genus e familia Curculionidum. Mem. Ac. Stockh. 1837.—Monographia Cassididarum. 2 vols., cum tabulis,8vo, Holmia?, 1850.—\nsecta Caffrariceannis 1838- 1845, a T. A. Wahlberg collecta amici auxilio suffultus, descripsit. 8vo, Ilolmiae, 1851. There are now two volumes of this work, containing descriptions of a great number of Coleopterous families. We may here enumerate them, with a view to exemplify the geographical distribu¬ tion of South African insects:—Buprestides, Elaterides, Cebrionites, Rhipicerides, Cyphonides, Lycides, Lampyrides, Telephorides, Melyrides, Clerii, Teredites, Ptiniores, Palpa- tores, Silphides, Flisteres, Scaphidiliae, Nitidulariae, Crypto- phagidae, Byrrhii, Dermestiori, Parnidae, Hydrophilidas. De Paravey. Du pays primitif du vers d soie, et de la premiere civilization. 8vo, Paris, 1851. Alexandre Sirand. Lettres sur les abeilles, avec des observations sur les precedes nouveaux. 8vo, Bourg, 1851. Franz. Xay. Fieber. Entomologische Monographien. 4to, Leipz. 1844.—Bhynchotographien. Drei Monogra- phische Abhandlungen. 4to, Prag. 1851.—Species generis Corisce, monographice dispositce. 4to, Prag. 1851.—Genera Hydrocoridum secundum ordinem naturalem in familias disposita. 4to, Prag. 1851. J. H. Hochhuth. Beitrdge zur naheren Kenniniss der Busselkdfer Busslands, &c. 8vo, Riga, 1851.—Beitrdge zur nacheron Kenntniss der Slaphylinen Busslands. 8vo, Riga, 1851. J. L. Leconte. Descriptions of new species of Coleoptera from California. 8vo, New York, 1851.—Memoirs on the classification of the Carabidce of the United States, in the Philidelphia Transactions, and various valuable papers on entomological subjects in the American scientific journals. Augusta Lombard. La veritable maniere d'clever et de multiplier les abeilles, contenant, &c.. moyen de sefaire un revenu annuel de 2600francs. 12mo, Paris. O L O G Y. 23 Carlo Passerine Notizie relative ad insetti coleotteri Biblio- dannosi, ad alcuni ospita7iti delle pianta del Ficus carica. 8raP^y* 8vo, Firenze, 1851. M. Wocke. Catalogue Lepidopterorum Silesice. 8vo, Breslau. L. Agassiz. The classification of Insects from Embryo- logical data. (Smithsonian Institution) Washington, 1851. J. J. Bourasse. Esquisses Entomologiques, ou histoire naturelle des Insectes les plus remarkables. 12mo, Tours. L. Doyere. Recherches surVAlcite des Cereales, I'etcndue des ces ravages, et les moyens de les faire cesser ; suivis de quelques resultats relatifs d Versdagedes grains. 8vo, Paris. Alphonse Gascogne. Excursion entomologique dans les Alpes des Environs de Mont Blanc. 8vo, Lyon. T. B. Gorski. Analecta ad entomographiam provinci- arum occidentali-meridionalium imperii Rossici. Fascic. i., 8vo, Berlin. Achille Costa. Ragguaglio delle specie piii interes- santi di Emitteri eterotteri raccolti in Sicilia, See. Esercit. Acc. 1839.—Storia della Bombyce neustria, suoi costumi, danni die arrecal, e mezzi per distruggerla, scritta per in- carico del reale institute d'incorraggiamento. Sec. 4to, Na¬ poli, 1851.—Storia della Tenthridine produtrice della gale dellefoglie del Salcio. (Salix Russelliana) 4to, Napoli, 1852. M. Gemjpnger. System Uebersicht d. Kdfer um Mun¬ chen. Jena, 1851. F. O. Morris. A Natural History of British Butterflies. 1 vol. royal 8vo, Lond. 1852. P. C. Zeller. Lepidoptera microptera. quae J. A. Wahl- berq in Caffrorum terra collegit, descripsit. 8vo, Holmiae, 1852. Maria E. Catlow. Popular British Entomology. With coloured plates, 2d ed., 12mo, Lond. 1852. J. B. Gehin. Catalogue des Coleopteres de sa collec¬ tion d Metz. 8vo, Metz. 1852. Kelch. Grundlage zur Kenntniss der Orthop- teren Oberschlesiens und Grundlage der Kdfer Oberschle- siens. 4to, Ratibor. 1852. Edouard Perris. Histoire des Insectes du pin mari¬ time. 8vo, Paris, 1852. F. Marcotte. Tableau Methodique et Synonymique des Coleopteres des environs d!Abbeville. 8vo, Abbeville, 1852. Eugene Robert (and Guerin-Meneville). Notice sur lesprincipaux resultats des educations de vers d soie, faites d la magnanerie experimentale de Saint-Tulle, et ay ant pour objet Vamelioration et I'acclimatation des races, Vetude des maladies, et la production de graine etalon. 8 vo, Paris, 1852. Heydenreich. Lepidopterorum Europceorum catalogus methodicus. Leipzig.— Verzeichniss der Euro- pdischen Schmetterlinge. Ibid. B. Gerhard. Versuch einer Monographic der Lycce- nen als Beitrag zur Schmetterlingskunde. 10 heft, mit col. taf., 4to, Hamburg. M. Bach. Kdferfaunafur Nord. undMittel-Deutschland, mit besonderer Ruchsicht auf die Prussischen Rheinlande. 8vo, Coblentz. J. Rakeburg. Die Ichneumonen der Forst-Insecten in forstlicher und entomologischer Bezeikung. 8vo, Berlin. C. G. Mannerheim. Insectes Coleopteres de la Siberie Orientate. Mosc., 1852. Beitrag z. Kafferfauna d. Aleu- tischen Inseln d. Inselsitka u. Neu-Calif or nien. (Bulletin de Mosc.).—Description de quelques nouvelles especes de Coleopteres de Finlande. (Ibid.)—Memoire sur quelques genres et especes des Carabiques. 1 partie (Ibid.) For the earlier works of this author, see p. 15. H. C. Kuster. Die Kdfer Europds. Nach der Natur beschreiben. 27 heft, mit 2 tafeln abbildungen, 16mo, Niirnberg, 1853. L. L. Langstroth. On the Hive and the Honey Bee. A Bee-Keeper’s Manual. With illustrations, 16mo, North¬ ampton, 1853. 24 ENTOMOLOGY. Biblio¬ graphy. Fr. W. Marlin. Beitrag till kannedom om insekternas geografiska erdbredning i norden med hufsredsakligt af- seende pa Skandinaviens och Finlands Fauna. 8vo, Hel¬ singfors, 1853. .11/^1 F. E. Melsheimer. Catalogue of the described Lole- optera of the United States. Revised by S. S. Haldeman and J. L. Le Conte. 8vo, Washington (Smithsonian In¬ stitution), 1853. Emile Tarlet. Rapport sur l introduction en trance des vers d soie sauvages de la Chine. 8vo, Paris (Societe Zoologique d’Acclimatation). T _ 7 F. Grassner. Blicke in das Leben und die hnturch- lungsgeschichte der Schmetterlinge, &c. Halle, 1853.—-/he Ento'mologen, Europe?s, Asien's, u.Amerilia's. 12mo, Jena, 18Telephe Desmartis. Resume des Travaux de la Commission Entomologique pour I'annee 1853. 8vo, Bor- deaux. Francis C. Woodworth. Wonders of the Insect World. With illustrations, 16mo, New York, 1853. Camille Jacquelin du Val. Manuel Entomologique. Genera des Coleopteres d'Europe, comprenant leur classifi¬ cation en families naturelles, la description de tons les genres, des tableaux dichotomiques, &jc., et pres de treize cents insectes representant un ou plusieurs types de chaque genre, &c. 8vo, Paris, 1854. (L’ouvrage sera public en 86 livraisons.) C. L. Koch. Die Planzanlduse aphiden getreunaeh dem Lehen abgebildet und bescrieben. 1 heft, mit 6 fern ausgemalten kupfertafeln. 8vo, Nurnberg, 1854. Andrew Murray. This observer has devoted himself to the Coleopterous order, and has enlarged our knowledge of the North British indigenous species in his excellent and accurate Catalogue of the Coleoptera of Scotland. 8vo, Edin. 1853. ? ? _ H. F. Saussure is the author of Monographic des Guepes Solitaires, ou de la tribe des Eumeniens. 8vo, fig., Paris, 1852-53.—Etudes sur la famille des Vespides.^ Monogra¬ phic des Guepes Sociales. 8vo, fig., Paris, 1853. H. Loew. Dipterologische Beitrage. 4 theil, 4to, Posen, 1850.—Bemerhungen iiber die Familie der Asiliden. 4to, Berlin, 1851.—Neue Beitrage zur Kenntniss der Dipteren. 1 beitrag, 4to, Berlin, 1853. Leopold Heinrich Fischer. Conspectus systematicus Orthopterorum Europce. 8vo, Lipsise, 1853. Orthoptera Europcea. 1 vol. 4to, Leipzig, 1853. See also p. 14. Otto Bremer and William Grey. Beitrage sur Schmetterlings Fauna des nbrhchen Chinas. 4to, St Petersburg, 1853. . Victor de Motschoulsky. Insectes de Sibene. 4to, Petersburg, 1843.—Die Coleopterologischen Verhaltnisse u. die Kafer Russlands. 8vo, Moscou, 1846.—Etudes En- tomologiques. 8vo, Livrais. 1-3. Helsingfort, 1853. F. A. Pouchet. Histoire Naturelle et Agricole du Hanneton et de sa larve, ou traite de leurs mceurs, de leur deqats, et des moyens de borner leur ravages. 8vo, Rouen, 1853. Lorenze Regona. Metodo semplice e naturale per coltivari i Bachi da Seta. 8vo, Venezia, 1853. H. D. Richardson. The Hive and the Honey Bee. New Edition by W. O. Westwood. 12mo, London, 1853. M. F. Chapuis et M. E. Candeze. Catalogue des larves We shall now proceed to consider that great department in Zoology, the extent and importance of which are suffi¬ ciently indicated by the foregoing list of authors and their works. des Coleopteres connus jusqu' d ce jour, avec la descrip- Bibli< tion de plusieurs especes nouve/les. 8vo, Liege, 1853. graph Otto Standinger. De sesiis agri Berolinensis Disser- v'— tatio Entomologica. 4to, Berol. 1854. C. A. Dohrn (Redacteur). Zeitung (Entomologische) herausgegeben von dem entomologischen Vereine zu Stettin. 15 Yahrgang. Stettin, 1854.—The same for some preced¬ ing years. C. F. Freyer. JSeuere Beitrdge zur Schmetterlings- kunde mit Abbildungen nach der natur. 105 heft, mit 10 illuminirten kupertafeln. 4to, Augsburg, 1854. J, F. Dawson. Geodephaga Britannica; a Monograph of the carnivorous ground Beetles indigenous to the British Isles. With coloured plates. 8vo, Lond. 1854. Jacq. Duval et J. Migneaux. Genera des Coleopteres d'Europe. Deyrolle, 1855. This beautiful work is being published in parts from time to time. They figure a species of each genus. Claudio Gay. Historia di Chili. La Historia fisica y politica di Chili. 8vo (with folio plates), 1853-54. In this sumptuous, though still unfinished work, 3 or 4 volumes are devoted to insects, in the hands of M. Blanchard and others. T. V. Wollaston. Insecta Madeirensia, being an ac¬ count of the Insects of the Islands of the Madeiran group. 4to, fig. col. Lond. 1854. This beautiful volume is one of the most valuable and praiseworthy contributions to ento¬ mology which has appeared in this country for a length of time. Under this bead we may state that in Webb and Berthelot’s Histoire Naturelle des lies Canariens, the insects of those islands are described by M. Brulle. Marsieul. This author is now in the course of publishing in the Ann. de la Soc. Ent. of France, an admir¬ able Monograph of the Histeridce. Leon Fairmaire et A. Laboulbene. Faune entomo¬ logique Franqaise, ou description des Insectes qui se trouvent en France. Tom. i., 16mo, Paris, 1854. Gabriel Koch. Die geographische verbreitung der EuropdischenSchmetterlinge in anderen Welttheilen. Nebst einer statistischen Tabelle. 8vo, Leipzig. Vicomte de Metivier. Memoire sur les chenilles de bois en general, et specialment du cheniliege ; leurs causes, leur efifets, les moyens preservatifs et destructifs de ces in¬ sectes. 8vo, Paris. J. T. C. Ratzeburg. Die Ichneumen der Forstinsecten in forstlicher undentomologischer Beziehung. 4to, Berlin. C. G. A. Brischke. Abbildungen und Beschreibungen der Blattwespen-Barren §c., mit einen Vorworte von J. T. Ratzeburg. 1 Lieferung, 4to, Berlin, 1855. Caspar Czerny. Neuestes Schmetterlings-Biichlein. Eine genaue Beschreibung der bei uns am haufigsten vor- kommenden Schmetterlinge. Fur die- Jug end bearbeitet. Mit 18 colorirten abbildungen, 8vo, Wien. M. F. de Saulcy. Catalogue des Especes d'Insectes Coleopteres, recueilles pendant le voyage autour la Mer Morte. 4to, Paris, 1854. Jac. Sturm. Deutschland's Fauna. Div. v., Insecten ; part 22, Coleoptera. 12mo, with 16 coloured plates. Nurnb. 1854. A. G. Dahlbom. Hymenoptera Europcea. 2 vols. 8vo, 1854. See also p. 17. 25 ENTOMOLOGY. r>€ lition. Entomology (from si/ro/xov, insect, and Xoyog, discourse'), Y ' is that branch of natural science which treats of the history and habits of the insect tribes. Its subjects are the most numerous and diversified of any of those topics which engage the attention of the student of nature; and as they exem¬ plify in a most surprising and admirable manner, both by their structure and instincts, the wisdom of the author and creator of all things, and form a highly interesting de¬ partment of human knowledge, we deem their elucidation deserving of a lengthened dissertation. The English term insect is no doubt derived from the Latin word insectum or intersectum, signifying cut into or intersected, in allusion to the obvious divisions of head, thorax, and abdomen, of which their general forms consist. The Greek word bears the same signification. CHAPTER I. DEFINITION OF INSECTS THEIR ORDERS EXPLAINED AND THEIR STUDY DEFENDED. In the article Animal Kingdom of this work (see vol. iii. p. 192), we have given a view of the primary divisions of the subjects of zoological science. The third primary division, that of the articulated animals, consists of four great classes:—1. Annelides, such as serpulae, nereids, leeches, earthworms, &c.; 2. Crustacea, such as crabs, lobsters, and shrimps ; 3. Arachnides, such as spiders, scor¬ pions, and mites ; and 4. Insecta, or true insects, such as beetles, butterflies, and moths. The class Insecta of Lin¬ naeus included not only those last named, but also Crus¬ tacea and Arachnides, and was thus almost co-extensive with what we now regard as a primary division under the term Articulata. We have, however, already discussed those two branches as distinct classes, under their respec¬ tive titles (see Arachnides and Crustacea), and we shall not repeat the important characters by which they are dis¬ tinguished from genuine insects. The term insect was anciently applied to a much more extended series of beings than are now included under that designation. It seems to have comprised whatever was destitute of an internal skeleton, and exhibited a body com¬ posed of articulated parts. In this sense it accords with its application in the writings of Aristotle and Pliny, with certain restrictions however, for these authors were in ad¬ vance of their successors, in as far as they distinguished the Crustacea from insects. Swammerdam and Ray adopted the definition of the ancient authors, but erred in classing the Vermes or worms with insects, a combination which does not appear for certain to have entered into Aristotle’s views. Linnaeus wisely separated these two classes, but at Definition, the same time injudiciously joined the Crustacea with in- sects, placing them in his order Aptera, along with spiders and scolopendrae. Fabricius in that respect followed the same general plan, and included all those living creatures in the same class, notwithstanding the better example shown by Brisson, who had separated all the species pos¬ sessed of more than six feet, that is, the Crustacea and Arachnides of Lamarck. Since the death of the great Swedish naturalist, our improved knowledge of the anatomy and physiology of the invertebrated classes has thrown a clearer light upon the subject, and many modifications have taken place in the arrangement of the insect tribes. Insects, properly so called, may be defined as animals without vertebrae, six-footed, with a distinct head furnished with two antennae and a pair of composite immoveable eyes, and breathing through stigmatic openings which lead to in¬ terior tracheae^ As we shall have occasion to mention many terms which may not be familiar to the general reader, we deem it ad¬ visable, instead of taking his knowledge for granted, to commence with a brief enumeration and explanation of the various orders in Entomology, so that their names, when subsequently brought forward, may be associated with some definite idea. We shall consider all insects as included under eleven dilferent orders, as follows. 1. Coleoptera (from KoXsog, a sheath, and wings), including all those kinds commonly called beetles. Their membranous wings, which are the true organs of flight, are protected by a superior and anterior pair of harder consist¬ ence, called elytra. They are all masticators, and are pro¬ vided with mandibles and maxillae. PI. CCXXXIV-XL. 2. Orthoptera (from ogdog, straight, and »; 1 Wilson’s Illustrations of Zoology, vol. i. pref. p. 4. ENTOMOLOGY. 29 £l£x tuni rnal to fix the insect in its natural horizontal posture, and to 'my. commence the dissection from the dorsal region down- wards. The following observations on the dissection of the mi¬ nuter animals may be of service to the student. “ The first thing that I have to observe is, that all dissections of small and soft objects, e. g. worms, zoophytes, insects, mol- lusca, &c. where it is desirable to obtain even tolerably accurate results, should be performed under water, by which the parts are kept floating and separated from each other, and consequently present themselves more distinctly. A very simple contrivance for investigations of this kind may be prepared in the following manner: A mass of tough wax (not too soft) is to be laid upon one or more porcelain saucers or capsules of different sizes, which are then to be put in a warm place until the wax melts so as to cover the surface evenly to the depth of a half or a third of an inch. If the object to be examined be laid upon this sur¬ face, it may be fixed by needles in any position that is wish¬ ed ; and, when covered with clear water, developed and dissected by means of suitable instruments. Of these, the best are very delicate forceps; pointed, well made, sharp¬ cutting scissars ; and small knives like cataract needles, some round, others with cutting edges, and fixed in slen¬ der wooden handles. For separating parts I have'cdso em¬ ployed small horn probes and fine brushes ; whilst for ex¬ amining them a good magnifying glass is frequently indis¬ pensable. If it is wished to preserve a preparation thus made, wax coloured at pleasure, as for the purpose of in¬ jections, is to be formed into little tablets about a quarter of an inch thick ; one of them is then to be placed upon the saucer or capsule containing the preparation; the lat¬ ter may then be transferred to it, arranged suitably upon it, fixed there by means of short needles, and both toge¬ ther placed in alcohol. Nor must I forget to mention, that the examination of very delicate organizations may frequently be conducted with greater facility and accuracy, if the object be previously allowed to remain some time in spirit, and thereby to become harder and contracted. This applies particularly to the dissection of nervous organs, and to the examination of very small embryos, of mollusca, and worms. There are various ways of destroying worms, insects, &c. for the purpose of dissecting, without injuring their organization. Mollusca, snails for example, as Swam¬ merdam has remarked, are to be allowed to die in water, because by that means their body swells, and all the parts become more distinctly visible ; they may afterwards be kept in spirit (though not too long) for dissection. Worms, the larger zoophytes (for the smaller must be examined whilst alive), caterpillars, &c. are best destroyed by means of spirit; insects, on the contrary, by being dipped rapid¬ ly in boiling water, or in oil of turpentine.”1 SECT. I THE EXTERNAL COVERING OF INSECTS. Our knowledge of the structure and anatomy of this class may be said to be still in its infancy ; for although many important facts have been legitimately generalized, we are still in ignorance of the formation of a thousand species for every one which has been examined. As the harder parts of insects, to which the muscles are attached, are su¬ perficial, the class has been described as bearing their ske¬ letons externally; and a transcendental anatomy has not scrupled to determine the exact analogy which each por¬ tion of their covering bears to the bony frame-work of the vertebrated tribes. This comparison has been instituted by M. Geoffroy St Hilaire, an eminent physiological natu- External ralist of France, who maintains, with many of his country- Anatomy, men, that all animals are vertebrated. The doctrine, what- ever may be its other merits, is not entitled to the credit of novelty, as an English writer of the name of Willis had, so far back as the year 1692, published his opinion that the external envelope of the body of insects represented the internal articulated column of the vertebrated tribes. M. de Blainville, on the other hand, regards the corneous covering of insects rather as analogous to the skin or cu¬ taneous system of the higher classes. The hardness of the calcareous or horny envelope of the greater number of insects is owing, in Latreille’s opinion, to the consistence of the excretion interposed between the dermis and the epidermis, or what is termed in man the mucous tissue. This excretion also contains the brilliant and varied colours which add so greatly to the beauty of the class.2 According to M. Odier, who has attentively examined the composition of the harder parts of insects, the substance of this envelope is of a peculiar nature. He has named it chitine. He observes that the phosphate of lime forms the great proportion of all the salts contained in the teguments of insects, while that ingredient is but trifling in the covering of the Crustacea, although the lat¬ ter abounds in the carbonate, which is not found in the other class.3 The facts stated by him militate against the analogies attempted to be established on the subject; and the observations of M. Straus go far to demonstrate that those teguments do not form a true skeleton, but really re¬ present the skin of the vertebrated classes. When we use the word skeleton, then, in relation to insects, the reader will understand its application merely to the external co¬ vering. On analysing the elytra of the cockchafer, M. Odier as¬ certained the existence, ls£, of albumen ; 2d, of an extrac¬ tive matter, soluble in water ; 3c?, of a brown-coloured ani¬ mal substance, soluble in potass and insoluble in alcohol; 'k/c, of a coloured oil, soluble in alcohol; oth, of three salts, viz. subcarbonate of potass, phosphate of lime, and phos¬ phate of iron ; Qth, of a peculiar substance which consti¬ tutes a fourth part in weight of the elytron. Albumen is so generally distributed among the animal organs that its presence was to be expected. But the oil is deserving of further experimental observation. Robiquet found it of a green colour in cantharides; while, according to Odier, it is brown in the cockchafer, and red in a species of crioce- ris. Now as each of these insects is itself of a correspond¬ ing hue, it is natural to suppose that the oil is the colour¬ ing matter. The peculiar substance which forms so large a proportion of the elytra is named chitine by M. Odier. If we plunge a coleopterous insect into a solution of potas¬ sium, and keep up a pretty high temperature, we shall observe that the so-called skeleton neither dissolves nor changes its form ; it merely becomes discoloured during the operation, while all the viscera and interior muscles disappear; and whatever remains of the insect is chitine. This substance exists in the whole of the envelope, and is also found to occur in the more solid covering of the Crus¬ tacea. If however we compare the preceding results with those obtained by M. Chevreul in the course of his experiments on crustaceous animals, we shall perceive some remarkable distinctions in the constitution of their harder parts. The presence of subcarbonate of potass is a striking character among insects. It does not occur in the class Crustacea. The phosphate of lime, a sparing ingredient among the latter, 1 Carus’s Introduction to Comparative Anatomy, translated by Gore, vol. ii. p. 389. 2 Rigne Animal, t. iv. p. 2. 3 Mem. de la Soc. d'Hist. Nat. t. i. p. 29. 30 ENTOMOLOGY. External forms a preponderating part of the salts in the envelope of Anatomy, insects, while the carbonate of lime is absent, although it forms the base of the carapace or covering of crabs and lobsters. It has been stated as a regulating law in animal chemistry, that the bones of the higher orders have more of the phosphate and less of the carbonate of lime in their composition, while the proportions were reversed among the inferior tribes. But the observations of M. Odier show the inadequacy of chemical character to serve as a basis on which to found our analogies of organization ; for if strictly applied to insects, that class must be removed from the place which they now occupy in our system, and be com¬ bined with others of a higher nature, with which in truth they have no connection. The harder and more solid parts of insects are certainly to them what the internal skeleton is to the vertebrated tribes. They form the support and frame-work of the body. It is on this account that the term skeleton, though not strictly applicable, has been used, both in ancient and mo¬ dern times, to designate the corneous external system of these creatures. This comparatively solid system is itself formed by the union of many parts, which however have received no general name; so that, while in discussing the vertebrated tribes we merely say that their skeleton is formed of bone, all that we advance in regard to insects is, that it is composed of pieces. In the higher tribes each individual bone is well known by its own distinctive name ; but the insect tribes in that respect have been but obscurely defined. Guided by the light of human anatomy, observers have sought to disco¬ ver in insects all those parts to which they could apply pre¬ viously established names; but analogies based upon mere appearance are incapable of great or useful extension ; and insects would certainly have been better known had they been studied in the first place individually, and no far¬ fetched comparisons instituted till after a more ample know¬ ledge of actual organization. But instead of this, the best determined functions of the superior animals have been assumed as points of departure, and all the parts of insects which seemed to fulfil the same purposes have been deter- minately regarded as analogous. Now it is quite admissi¬ ble to say, that in insects, as among the vertebrated tribes, there is progression, vision, manducation, &c. because these are the attributes, more or less general, of all living beings ; but it has not always been demonstrated that particular and more special functions are always performed by the same or apparently corresponding parts. M. Dufour, how¬ ever, has announced the following results in relation to the articulated animals themselves : ls£, that the skeleton of the Crustacea and Arachnides (two important classes already described in this work) does not differ from that of insects except by the mode of growth of the rings of which it is composed ; 2d, that those two classes of animals and in¬ sects themselves do not differ among each other, but by the greater or less extent in the development of the parts of which they are composed. The same may be asserted in regard to the disparities observable between the different conditions of insects in the larva, the chrysalis, and the perfect state. The vari¬ ous forms under which the same species is exhibited, and the singular and sometimes sudden transformations to which it is subjected, are found to result, when analysed, from the growth of parts. This has been demonstrated by the writ¬ ings of Swammerdam and other modern writers on the ana¬ tomy of caterpillars, as well as by the beautiful and more recent observations of Savigny on the mouths of Lepidop- tera in the perfect state, compared with the same parts in their earliest condition.1 The observation is particularly applicable to the solid parts of insects. In the larva each segment exists under a nearly uniform development, while in the perfect state several of these segments have acquired a prodigious increase. This is the cause of the vast dif¬ ference in their exterior envelope at different periods of their existence. The nymph or chrysalis is in the inter¬ mediate condition, and is formed, like the larva, of simple rings, which, however, no longer exhibit an equal degree of uniformity. But the perfect insect is the final term of transformation. Considered in a general way, its co¬ vering does not essentially differ from that of the larva; but the three segments next the head have acquired a great increase of bulk, to enable them to support the appendages of legs and wings, which were merely ru¬ dimentary, or scarcely existent, in its first condition ; and the distinction of head, thorax, and abdomen becoming strongly visible, the entire aspect of the insect has under¬ gone a change. It is highly interesting to observe the influence which the decrease or development of one portion of structure exercises upon another ; in other words, the constant and intimate relation of the proportion of parts. The maxi¬ mum of increase in the metathorax is always in relation to the rudimentary state of the mesothorax, while, on the contrary, the development of the latter produces or accom¬ panies the decrease of the former. Thus also the parts of the mouth, as demonstrated by M. Savigny, are sometimes free, and capable of vaided movement, for the purposes of mastication; while in several tribes they are brought close together, lengthened, and as it were amalgamated in the form of trunk or sucker; and so the segments of the tho¬ rax, in the different orders, more or less disunited among themselves, support the wings, the balancers, the elytra, according to the various kinds. From these and similar considerations have been deduced the conclusion that the increase of one portion exercises over the neighbouring portions a peculiar influence, which explains whatever dif¬ ferences may be remarked in the individuals of each order, family, and genus. And this general consequence, which results from numerous observations, necessarily includes and accounts for that incoherent series of anomalies so puz¬ zling to the superficial inquirer, but which are only regard¬ ed as such, because the labourers in the field of anatomy have but seldom taken into their consideration the totality of the articulated animals, and have more seldom still thought fit to occupy themselves in a careful comparative analysis of the parts which enter into the composition of the external skeleton of these despised tribes. We shall here briefly consider the essential characters of the so-called skeleton among the articulated tribes. It is composed of segments, which are themselves formed by a determinate number of pieces ; but their most obvious cha¬ racter is, that they are provided with a pair of feet, and with two openings to the respiratory organs. But along with such segments as present these parts, we may usual¬ ly observe many others which are not so provided, or at least in which the feet are wanting; and they may either differ in their size and proportions, or closely resemble each other in those respects. In the latter case, the most simple form is exhibited; and if we ascertain the composition of a single segment, and their amount, we have a knowledge of the entire animal. This simplicity of form, however, is not often observable ; for it more frequently happens that the same individual presents great disparity in the size and composition of its segments, and in the appendages with which they are furnished. The Scolopendrae (belonging to the class Myriapoda) ex- External Anatomy. 1 Mimoires sur les Animaux sans Vertebres. E N TOM External hibit, according to M. Dufour, one of the most simple forms Anatomy. 0f the articulated- classes, in as far as they present the great- est uniformity of character in the parts of which they are composed. Even in them, however, we may observe, at the anterior portion, some pairs of feet, which are rudimen¬ tary, and crowded together towards the head; so that it would be possible to figure an animal still more uniformly composed, by supposing that the feet thus thrown together had been developed uniformly with the appendages of the ensuing segments. We should then have had to recognise merely a head, and a certain number of rings, all of a like nature. But it might be possible still further to reduce and simplify the proposition, by regarding the head itself as an assemblage or union of segments, bearing appendages merely analogous to the feet. Thus, to realize the suppo¬ sition of a skeleton uniformly constructed throughout all its parts, nothing more wouid be necessary than to give to the segments of the head a development equal to that of the others, and to restore to its appendages (the feet) their essential usage, that of locomotion, instead of the secon¬ dary usage to which they had been subjected. This view has been presented in order to exhibit what has been re¬ garded as the fundamental plan of insect formation; for it is in truth the corresponding or unequal increase of the segments, the union or division of the pieces of which they are composed, the maximum of development in some, the rudimentary condition of others, that form the agreements or differences of character in the entire series of articulat¬ ed animals.1 If the development is uniform, or nearly so, in each segment, we have the condition of the Annelides, of worms, and of the larvae of insects. If, on the contrary, this equilibrium is destroyed, and the maximum of increase takes place in the first, second, and third segments ensuing the head, we have the form and character of a perfect in¬ sect ; if the change is still greater, we reach the Arachnides; if greater still, the decapodous Crustacea. The importance of studying the skeleton of insects is greater than even among the higher classes, because, being essential, it forms a genuine basis, and being at the same time external, it offers to the eye of the zoologist a ready mode of determination. While engaged in the consideration of the various or¬ gans of insects, a numerous list of disparities in structure might no doubt be collected, and the term anomaly, ac¬ cording to its frequent but by no means philosophical ap¬ plication, brought into constant use. That fatal word, however, has been too often substituted in place of an ex¬ plicit interpretation of phenomena not in any way difficult of solution, certain general principles being kept in view. Of these, one of the most importance is, that all the differ¬ ences exhibited by insects, and all the so-called anoma¬ lous organs which they present, are the result of a greater or less development of certain parts existing generally throughout the entire class.2 The contrariety of opinion among naturalists regarding the existence or proportion of certain parts of structure, has arisen partly from a discor¬ dance in the use of terms, and partly from the organs themselves not being submitted to a careful analytical in¬ vestigation. It is thus, for example, that the names of sternum and scutellum, in place of being bestowed on por¬ tions of which the contours have been precisely determin¬ ed, have only been applied when these portions happened to exhibit certain accidental and conventional characters. By this means we read in almost every page of classifica¬ tion, that one insect possesses a scutellum and that another does not; or that a particular genus is characterized by its existence, and another by its absence ; while the fact is, O L O G Y. 31 that these parts exist in all insects, although the names in Exterhal their usual application have been bestowed only upon pe- Anatomy, culiar and not very important variations in thejform. SECT. II. THE EXTERNAL CHARACTERS OF THE PRINCIPAL SEGMENTS OF AN INSECT’S BODY, VIZ. THE HEAD, THORAX, AND ABDOMEN. The form of the external covering of insects, even of the same species, differs greatly according to the existing condition of the individual. The segments of which the bodies of larvae are composed are generally of a uniform size when compared with each other, and the singular phe¬ nomena presented by metamorphosis consist chiefly in the greater development assumed by certain segments than by others. The nymph (called chrysalis among the Lepid- optera) exhibits the intermediate or transitionary state. Its segments are unequally developed, and this inequality is greatly increased on the assumption of the final state, in which certain segments are prodigiously enlarged, while others suffer a corresponding diminution. In the imago, or complete condition, the three segments next the head under¬ go the most notable alteration ; for, besides their increase of bulk, they become furnished with wings and articulated legs, which had previously existed in a very rudimentary condition. In that state also the relative proportions of the segments are so changed that the identity of several becomes difficult to recognise, and the most obvious divi¬ sions henceforth consist of head, thorax, and abdomen. These parts are severally characterized by peculiar attri¬ butes, the nature of which we shall now endeavour to ex¬ plain. The head is by far the most complicated portion, and it is necessary that its structure should be well understood, as it furnishes the most important characters on which mo¬ dern genera are founded or made known. The parts most deserving of attention are the mouth, antennce, and eyes. The organs of the mouth present in their different com¬ binations a great variety of form among the articulated classes. In relation to all such animals as are provided with a head, more particularly the vertebrated tribes, the term mouth is never of ambiguous application, but refers to those parts which are placed exteriorly at the entrance of the intestinal canal, and effect the process of mastication; but in regard to the acephalous or nearly headless tribes, such as annelides, worms, and the radiated animals, its ap¬ plication is less definite and precise. Among the great series of living beings included by Linnaeus in the class of insects, all of which are furnished with a head, the parts of the mouth are no longer doubtful. It has been remarked, however, that the sucker of the larvae in the last family of the dipterous order being entirely interior when not in use, presents a singular approximation in that particular to the intestinal worms. It will be readily conceived that the mouth of insects must be adapted to the particular manners of life peculiar to each natural group, and must therefore vary in accor¬ dance with their instinctive habits. It was thus that even the earliest naturalists perceived and expressed the distinc¬ tion between insects provided with teeth or cutting jaws, and those furnished with trunks or suckers. The use of the microscope in modern times, and the deep desire which prevailed towards the conclusion of the seventeenth and commencement of the eighteenth centuries, to illustrate the mysteries of animal organization, produced much more de¬ tailed and exact accounts of the parts of the mouth in insects than were previously possessed. The works of Leeuwen- 1 Ann. des Sciences Nat. t. i. p. 115. s Ibid. p. 102. 32 ENTOMOLOGY. External hoeck, Swammerdam, and Reaumur are mines of informa- Anatomy. tion; while Scopoli and Degeer still further generalized the observations of these illustrious naturalists. Scopoli, we believe, wras the first to apply the knowledge of these parts in characterizing the genera of the hymenopterous and dip¬ terous orders ; but it is to a celebrated disciple of Linnaeus, John Christian Fabricius, that we owe the first general theory of the parts of manducation, and its application to entomology in general. The alimentary substances sought for by insects are either comparatively hard and solid, or of a more soft and fluid nature. Thence we find upon examination numerous tribes of insects provided with a mouth so constructed as to tear and masticate the substances on which it is design¬ ed to act; while many others are characterized by a tube¬ like mouth, or one resembling a delicate tongue extended when in action, and spirally rolled upon itself when in re¬ pose. Hence the great primary distinctions among the orders of insects, and their recognised division into masti¬ cators (mandibulata) and suckers (haustellata), the former living on solid substances, the latter on such as are fluid. Whatever may be the structure of the mouth in insects, it is to one or other of those types of form that each must be referred. We are indebted to the beautiful researches of Savigny (1814) for the first accurate analysis and elucida¬ tion of these parts, and of their relationship throughout the articulated tribes. Latreille, however, had previously insti¬ tuted a slighter comparison between the mouths of the suc¬ torial and mandibulated tribes, as Lamarck has admitted in his report on Savigny’s work. Savigny divides insects formerly so named into two groups, the hexapodes, or such as have six feet, and the apiropodes, or such as possess a greater number. The mouth of the latter forms two proper types distinct from those of the former; but it is with the polymorphous hexa¬ podes, or such as undergo transformations, that is, insects properly so called, that we are now concerned. We shall first consider the parts of the mouth in the masticating tribes. They are essentially as follows: The labrum, the mandibles, the maxillae, the palpi, the labium, and the mentum, the two latter, according to the views of different observers, sometimes passing under one and the same name. The reader may here consult PI. CCXXXIII. fig. 1, a, b, c, d.' The labrum or upper lip (fig. 1, a) is a flattened some¬ what deflexed portion, consisting of a single piece,1 2 placed on the upper side of or above the mouth, and capable of moving upwards and downwards, or vertically. It is vari¬ able in form, but is usually somewhat square, often wider than long, and frequently notched or bifid. It is of a hor¬ ny consistence, sometimes coriaceous, or even approach¬ ing to what may be named membranous in certain tribes, and is attached to the anterior portion of the head by a very short articulation. The mandibles or upper jaws (mandibulce, fig. 1, bb) are two strong horny pieces, generally of a triangular form, more or less curved, convex externally, concave on their inner surfaces, and frequently toothed or serrated on their interior edge. They are placed on each side of the mouth by insertion on the sides of the head, immediately beneath the labrum or upper lip, which usually covers their base. They are each composed of a single piece of a hard con¬ sistence, and may be said to correspond to the jaws of the vertebrated tribes, the process of mastication being princi¬ pally performed by them. They differ, however, in this respect, that their motion, instead of being vertical, is ho- External rizontal, or from within outwards, and vice versa. They Anatom)-, vary greatly both in their actual size and relative dimen- sions, being small and slender in the glow-worm {Lampyris), and very large, projecting, and antler-like in the stag bee¬ tle {Lucanus cervus), the species which we have selected for our engraved illustration. These internal surfaces are fre¬ quently parallel, but their dentations are not always the same in each, the projections of the one being however fre¬ quently so arranged as to enter the concavities of the other in order to admit of their closer union. But this is not seldom prevented by the curvature of the tips ; and in se¬ veral instances, where the mouth is wide, and the mandi¬ bles rather remote from each other at the base, the blades cross each other a little beyond the centre. The denta¬ tions of the mandibles, though sometimes called teeth, are merely projecting parts, although in the orthopterous tribes a coriaceous lamina seems in some respect to distinguish them from the body of the mandible to which they are attached, thus exhibiting an approach to that mode of fix¬ ture called gomphosis, in which one bone is fixed within another, as in the teeth of the higher tribes. The mandi¬ bles are more variable in their forms than the maxillae, and may occasionally be observed to differ (as in the genus Lu¬ canus) even in the sexes of the same species. Immediately beneath the mandibles are situated the maxillae or under jaws (fig. 1, cc), w hich are likewise placed on each side of the mouth, and take their origin from the inferior and internal part of that cavity, near the origin of the under lip. Like that of the preceding parts, their ac¬ tion is horizontal, but their texture is less rigid, approach¬ ing to membranous, their colour usually paler, and their internal edges toothed, or finely fringed with hairs. The different portions of the maxillae have received different names, such as the cardo or hinge, the stipes or stalk, and the lobus or lobe (one or more) which forms the terminal portion. The last named is the most important portion, as it acts upon the food when preparing for deglutition, and when armed with teeth its substance is as hard as that of the mandibles. “ This part,” says Mr Kirby, “ is either simple, consisting only of one lobe, as you will find to be the case with the Hymenoptera, Dynastidae, Nemognatha, and several other beetles ; or it is compound, consisting of two lobes. In the former case, the lobe is sometimes very long, as in the bee tribes, and at others very short, as in hister, &c. The bilobed maxillae present several different types of form. Nearest to those with one lobe are those whose lower lobe is attached longitudinally to the inner side of the stalk of the organ, above which it scarcely rises. Of this description is the maxilla in the common dung bee¬ tle ( Geotrupes stercorarius), and rove beetle (StaphyUnits olens). Another kind of formation is where the lower lobe is only a little shorter than the upper ; this occurs in a kind of chafer {Macraspis tetradactyla, Macleay). A third is where the upper lobe covers the lower as a shield; as you will find in the Orthoptera order, and the Libellulina, and almost in Meloe. A fourth form is where the upper lobe somewhat resembles the galeate maxilla just named, but consists of two joints. This exists in Staphylinidae, &c. The last kind I shall notice is when the upper lobe not only consists of two joints, but is cylindrical, and assumes the aspect of a feeler or palpus. This is the common cha¬ racter of almost all the predaceous beetles {Entomophagi, Latr.).”3 This lobe, which has been usually regarded as an 1 a is the labrum, surmounted by its broad nasus ; & the mandibulse ; c the maxillae, with their jointed palpi; d the bifid labium, with its two palpi and broad basal portion or mentum. * In the female of a small bee of the genus Hatictus it is said to be furnished with a slender appendage. * Introduc. to Entom. vol. iv. p. 442. E N T O M External additional palpus or feeler, is strictly analogous, in Mr Kir- Anatomy. by’s opinion, to the upper lobe in other insects, and he thinks ' it ought rather to be called a palpiform lobe than a palpus. When there are two lobes, the upper one is most common¬ ly the longer; but in many species of the tribe last allud¬ ed to, the lower equals or even exceeds the upper in length.1 Most of the predaceous beetles have the inner lobe of the maxillae armed with a terminal claw, which, among the Ci- cindelidae, is articulated and moveable, but fixed in the other carabideous kinds. The maxillae are chiefly serviceable in holding the food, and preventing its falling from the mouth during the action of the mandibles, although in certain cases they no doubt also act their part in comminution. They are more fixed in their forms than the mandibles, and are of more essential service to the naturalist for the purposes of classification. Fabricius, indeed, has deduced the principal diagnostic of ten out of the thirteen orders (or classes, as he terms them), of which his system is com¬ posed, from these important parts* We shall now briefly notice certain appendages of the maxillae, the existence of which forms another distinction between them and the mandibles or upper jaws, which are never so provided. Towards the middle of the outer edge of the maxillae are attached two slender articulated filiform processes, known under the name of palpi (see the figure above referred to) ; the longer pair being the exter¬ nal, the others the internal palpi. Both are called maxil¬ lary, to distinguish them from the labial palpi, afterwards mentioned. According to the view expressed by Mr Kir¬ by in the preceding quotation, the reader will perceive that each maxilla may be regarded as properly possess¬ ing only one palpus, although in certain tribes the upper lobe being jointed and palpiform, has occasioned its being regarded as one of these organs. The palpi are distinctly articulated, or composed of several jointed parts, and are capable of rapid and extended motion. They derive their name from a Greek word, which signifies to feel, and are supposed to constitute one of the principal organs of touch. Their uses, however, in the insect economy have been variously interpreted. Bonsdorf regarded them as the organs of smell; while Knock, agreeing in that opinion so far as regards the maxillary palpi, conceives that those of the labium exercise the faculty of taste. Cuvier and Kirby favour touch as their true function, and this view is confirmed by the constant use which numerous species make of these organs while walking, by applying them perpetually to the surface of whatever objects they pass over. That they perform that function is rendered ex¬ tremely probable by their structure, which is beautifully adapted, by its peculiar pliancy, to the examination of the substances with which they come in contact. They are in some respects analogous to the articulated extremities which form the principal seat of the sense of touch in ver- tebrated animals. It has also been noticed that several aquatic beetles, while swimming, bend back their anten¬ nae, and stretch forward their palpi, as if to explore their way through the ambiguous and weedy waters. As acces¬ sory to the maxillae, they are no doubt also employed in the selection of the most suitable alimentary portions of whatever substances have been previously seized upon by the more powerful parts of the mouth. In many insects there is only a single palpus to each of the maxillae. As the mouth is covered above by the labrum,, or upper lip, so it is closed below by the under lip, or labium (fig. 1, d). The latter differs in its structure from the labrum, being more complex than that organ, and composed as it were of two portions joined together. It varies in its form, O L O G Y. 33 is usually notched in front, and frequently furnished with External a triangular tooth in the centre, which is sometimes bifid. Anatomy. Mr Kirby defines the labium as a moveable organ, often biarticulate, which, terminating the surface anteriorly, co¬ vers the mouth from beneath, and is situate between the maxillae. It includes the mentum and labial palpi. The more uncovered portion of the labium, or that which pro¬ jects from the basal portion, is now named languette or li- gula by Latreille, in consonance with the nomenclature of Fabricius. The mentum, or chin, is the lower joint of the labium when the latter is jointed ; in other cases its base. Some contrariety of opinion seems to exist in the no¬ menclature of these parts. Mr Macleay bestows the name of mentum on the middle piece of the lower apparatus of the mouth. Its anterior portion, to which the palpi are so frequently attached, he calls the labium, while the basal part of the mentum is designated the stipes. In this view the labium of Macleay corresponds to the ligula, or rather tongue, of Kirby, while the mentum of the latter is analo¬ gous to the stipes of the former ; for it appears that the term mentum is only applied by the author of the Intro¬ duction to Entomology to the lower division of the labium, when that organ (as in Hydrous piceus) appears to consist of two joints or pieces. When there is no apparent divi¬ sion, or the only separation consists in a transverse elevated line (as in some lamellicorn beetles), or an obtuse angle formed by the meeting of the two parts, then the entire piece (the mentum merging in it) is regarded by Mr Kirby as the labium. Among the greater proportion of masticating insects there is placed anteriorly at each side of the ligula a small sup¬ porting piece or article, which takes its rise a little above the pharynx, and is terminated by a projecting appendage. These parts were named paraglossee by Illiger; and M. Latreille regards them as the true representatives of the tongue of the higher tribes. The labial palpi (Fig. 1, d), are inserted on each side of the ligula, and are usually longer than the internal and shorter than the external maxillary palpi. These palpi have never more than four articulations, in which they also differ from the exter¬ nal maxillary, which range from four to six. They are called labial palpi, because in many cases they derive their origin from the labium strictly so called; but in reference to Mr Kirby’s nomenclature of the parts, they might with equal propriety be denominated lingual palpi, since they not unfrequently emerge from what that excellent observer considers as the tongue. Among the predaceous Coleop- tera, indeed, their source seems common to both these parts, as their base on its upper side is attached to the labium, on its under to the ligula or tongue. In some insects, such as the Orthoptera and dragon-flies, the membranous portion with which the anterior or inter¬ nal face of the ligula is furnished, is thick and dilated neai the centre, in the form of a little tongue, and is often divid¬ ed near the middle by a groove. This portion, in the opi¬ nion of Latreille, probably occupies the place of the pa- raglossce; for these latter/in the instances referred to, are wanting, or not to be recognised. These are the principal parts of the mouth among the masticating insects. At the anterior root of the ligula, and a little lower than the middle of the interior space which intervenes between the mandibles, is placed the pharynx. In many Hymenoptera this orifice of the oeso¬ phagus opens and shuts by means of an appendage, pre¬ viously noticed by Reaumur in humble bees, and taken by Latreille for the labrum, in his observations on the struc¬ ture of wasps. Savigny has since paid particular attention VOL. IX. 1 Jntroduc. to Entom. vol. iv. p. 442. E 34 ENTOMOLOGY. External to it, and has named it the epipharynx or epiglossa. La- Anatomy. treille conceives it would be more simple to call it the sub- labrum, because it is inserted beneath the anterior and su¬ perior margin of the head, immediately after the origin of the labrum. It. is formed of two flattened portions, en¬ tirely or in great part membranous, applied the one upon the other, and of a triangular form. The upper portion is the most advanced. This epipharynx, instead of being peculiar, as some have supposed, to the Hymenoptera, may be safely regarded as existing in the other masticating in¬ sects, particularly the Coleoptera, among which it seems represented under a modified form of structure by the membrane which clothes the corresponding portion of the head. Although the hymenopterous tribes differ from the other mandibulated orders, by the prolongation of the maxillae and labium, and the valvular aspect of the former, yet the parts of the mouth do not present any essential distinction. A remarkable characteristic of these orders, however, con¬ sists, as Savigny informs us, in the absence of the men- tum properly so called. They also exhibit this disagree¬ ment from the other masticators, in as far as their maxillae embracing longitudinally the sides of the labium, these parts unite together so as to form a tubular body or trunk (promuscis), serving for suction. As their aliments consist of softish substances, or of nectarous juices, which, passing between the maxillae and the labium, by means of the suc¬ cessive pressure of the former parts upon the latter, eventu¬ ally arrive at the pharynx, they may in truth be regarded as semi-suctorial. Even the Rhinchophori among the Cole¬ optera, and the Panorpati in the neuropterous order, are furnished with an apparent trunk or prolongation of the muzzle (prorostruni) ; but that peculiarity is nothing more than an extension of the anterior portion of the head; and the organs of manducation, placed at its extremity, though of diminished size, in no way differ in structure from those of the other groups of their respective orders. We may add, that the labium or lower lip in the hymenopterous tribes is generally moveable at its base, as may be observed in the corresponding tribes of the suctorial insects. In the suctorial or haustellated orders, properly so call¬ ed, the organs of the mouth appear at first sight to differ entirely from those above described. The parts which are regarded as analogous to the maxillae, and frequently even those which represent the mandibles, are fixed and im¬ moveable, either entirely so, or towards their base, and (in regard to the maxillae) as far as the origin of the palpi. When the terminal portion is moveable, it is long, narrow, linear, sometimes in the form of a thread or bristle, some¬ times resembling a dart or lancet, and fitted for piercing. The pharynx is the central point around which these por¬ tions arrange themselves after the tubular form. Some¬ times the lower lip, united with the inferior portion of the maxillae, and fixed like it, closes the cavity of the mouth, and the maxillae then constitute a kind of spiral tongue. In other cases it is greatly prolonged, and assumes the form of an articulated tube, or of an elbowed trunk, usually terminated by two lips susceptible of dilatation. In either of the latter states it serves as a sheath to certain portions of a scaly structure and piercing nature, in the form of a bristle or lancet, and representing the other parts of the mouth. Sometimes this sheath (as in Pulex) is bivalvu- lar, but it more frequently consists of a single piece later- External ally folded so as to form a tube open on the upper surface. Anatomy. In this longitudinal canal or gutter, the preceding parts are lodged, and compose by their general union the sucker, or haustellum. In some instances the palpi have disap¬ peared, in others only two are visible. When there are four of these parts, two of them, the maxillary, are ex¬ tremely small, or almost imperceptible. Sometimes, as among the pupiparous Diptera, the lower lip is either non¬ existent or rudimentary, and the palpi become the sheath of the sucker. Though we make frequent use of the lat¬ ter term, it may be remembered that its application is not strictly correct, as it is not by suction, or the production of a vacuum, that the alimentary juices mount towards the pharynx, but rather by the continuous pressure of the parts upon each other. Of all the suctorial or haustellated tribes the Lepidop- tera are those which differ least from the type of the man¬ dibulated orders in the structure of the mouth,—on which account they have been made to follow in a supposed na¬ tural sequence the hymenopterous insects.1 Their mouth seems to consist of a labrum and of two extremely small mandibles; of a trunk spirally rolled, improperly regarded as a tongue, and presenting interiorly and throughout its entire length three canals, of which, however, the central alone serves for the influx of the alimentary juices, and formed of two linear or filiform bodies, surrounding the pharynx at their origin immediately beneath the labrum. They represent, under peculiar forms and proportions, the terminal parts of the maxillae, united, hollowed into deep gutters on their internal side, and bearing each a palpus, usually very small and tuberculiform. There is also a la¬ bium or lower lip, of a nearly triangular form, immoveable, united, as formerly mentioned, to the inferior part of the maxillae, which supports the filiform or trunk-like portion, and bearing two triarticulate palpi, covered with scales or hairs, and placed on each side of the trunk, for which they form a kind of sheath. The intermediate canal of the trunk is produced, according to the detailed description given by Reaumur, by the union of the gutters of the in¬ ternal face of the filiform or extended portions. The sucker of the hemipterous tribes received from Fa- bricius the name of rostrum, a term translated beak {bee) by Olivier and other entomologists of France. A blade more or less linear, coriaceous, divided into three or four articulations, rolled up at the edges so as to form a conical or cylindrical tube, always directed inferiorly while inac¬ tive, and presenting along the centre of its upper or ante¬ rior surface a kind of canal produced by the opening left between the rolled-up margins,—a sucker composed of four slender, capillary, corneous, flexible, and elastic threads, disposed in pairs, but combined together, with the two in¬ ferior portions united in one at a short distance from their origin,—a small piece in the form of a triangular ligula, usu¬ ally toothed at the extremity, rather coriaceous or almost membranous than of a scaly texture, and covering from be¬ hind or from the sides of the tubular body the base of the sucker, and inclosed along with it in the groove of the gene¬ ral sheath,—another piece of the same consistence with the preceding, corresponding by its insertion, and the position which it occupies, to the labrum or upper lip, covering fi’om above the base of the sucker, most frequently itself 1 Plate CCXXX1II. Fig, 5 exhibits the structure of the mouth in Papilio Machaon ; a the head viewed in front, exhibiting the round eyes, one turn of the spiral proboscis, with the pilose labial palpi on each side; 6 shows the tubular spiral maxillae (which bv their union form the proboscis), with the vestiges of palpi at their base; the circular apertures on each side at the bottom of the figure indicate the insertion of the labial palpi; c represents the cleft labium and the two palpi, the left one being deprived of its scales to show the articulations ; d is the minute labrum, with the mandibles on each side of it, ciliated on their internal edge. Fig. 8 exhibits the mouth of another lepidopterous insect, the Lyndia cannarum of Savigny ; a the eyes, scaly spiral proboscis, and the four palpi; b one of the maxillae, with its palpus ; c the labium and palpus; d the labrum and mandibulae. ENTOMOLOG Y. 35 External likewise inclosed in the sheath, and of a more or less elon- Anatotny. gated triangular form,—these are the parts which enter into the composition of the beak-like mouth or rostrum of the hemipterous tribes.1 The single superior portion which Latreille regards as the analogue of the labrum, appears to cover, at least among the Cicadas, the base of another more elongated and pointed portion, which has been view¬ ed as corresponding to the epipharynx.2 The other single and opposing portion, protecting from behind the origin of the sucker, and placed immediately behind the pharynx, represents, according to Savigny, the tongue or hypopha- rynx. The two superior filaments of the sucker, or those which are exterior, replace, or rather represent, the man¬ dibles, while the two others may be regarded as maxillae. Finally, the tubular sheath assimilates to the labium or lower lip, even in regard to its articulations. Sometimes the sheath is bifid, as in Thrips ; sometimes it is divided into two plates, as in Pulex. The first of these genera is stated by Latreille to be the only one in which he has dis¬ covered palpi. He thinks that the parts taken for such by Savigny in Nepa JVeptunia (PI. CCXXXIII. fig. 6, as described in the preceding note), are more probably the rudiments of an articulation of the sheath. Germar indeed admits four palpi as characteristic of a new hemipterous genus of the family of Cicadariag, named Cobax; but Kirby, who about the same period published an account of another generic group under the title of Otiocerus, and which offers analogous parts, does not regard these as palpi, but as simple appendages accompanying the an¬ tennae.3 In the dipterous order, such as gnats and common flies, the mouth exhibits a great resemblance to that of the pre¬ ceding tribes.4 * The union of the different parts forms what is usually in that order called the trunk or proboscis. We can here also distinguish the component parts of sheath and sucker. The former in dipterous insects is divisible into three principal portions ; ls£, the support, distinguish¬ ed from the following by an angular elbow, and frequently by a small geniculated article ; 2ri/y, the stalk ; 3dly, the summit, formed by two lips, sometimes membranous, large, vesicular, dilatable, striated, exhibiting through the mi¬ croscope a great number of tracheal ramifications ; some¬ times coriaceous, and either small and slightly distinct from the stalk, or slender, elongated, and forming a more obvious article, almost as long as the preceding division (as in genus Myopd). The support is remarkable in this, that it results from the prolongation of the cutaneous mem¬ brane of the anterior and superior portion of the head, or the epistoma, united with the parts representing the la¬ brum, to the mandibles, the maxillae, and the inferior por¬ tion of the labium, as far as the mentum inclusive. This character particularly distinguishes the present tribes from those of the hemipterous order. In other respects the sheath may be said to be constructed on the same plan. The centre of the superior face of the stalk also presents External a groove or gutter for the reception of the sucker. The Anatomy, number of pieces in the sucker varies according to an ’“Y''1-' arithmetical progression of three terms, of which the dif¬ ference is always two—2, 4, 6; but in all cases there are always two portions which are not paired, the one superior, representing the labrum ; the other inferior, placed behind the pharynx, and the analogue of the tongue or hypopha- rynx. Among the Diptera, as well as in the suctorial tribe {Pulex), the latter portion is always scaly and piercing, and contributes, in common with the others, to the purposes of nutrition. It is otherwise with the Hemiptera, and this dis¬ tinction forms a new character of separation between that order and the insects now under consideration. The parts representing the maxillae always exist, and are frequently accompanied each by a palpus; but these maxillae are sol¬ dered to the support, and are indistinct, except where their apical portion becomes moveable and elongated, and presents the form of a seta or horny lancet. This always takes place when the sucker consists of from four to six pieces. In the latter case two of them represent the man¬ dibles ; in the other, or where the sucker is composed of only four setae, these are wanting, or merely rudiment¬ ary. Sometimes also the labrum, almost always vaulted and large, seems to offer the vestiges of another piece, which, under a fuller development, might no doubt be regarded as the epipharynx. Sometimes the support is very short, and in this case the pieces of the sucker leave the cavity of the mouth, and the maxillary palpi are in¬ serted on the sides. The Hippoboscae, or pupiparous Dip¬ tera, differ from all the rest in the absence of the sheath ; for the palpi, under the form of two coriaceous elongated blades, perform its functions, and advancing in a parallel direction, cover and protect the sucker. In accordance with the observations of Latreille, as well as with those of Savigny, Leclerc de Laval, and Professor Nitzsch, regarding the structure of the mouth in such of the hexapod insects as undergo no metamorphosis {hexa- podes homotenes), the general plan of organization seems in these to be the same as among the polymorphous or¬ ders. In Pediculus, properly so called, the only known suctorial species of that division, the trunk (rostellum) con¬ sists of a small inarticulate tube, inclosing a sucker, and withdrawing itself at pleasure within a muzzle-shaped ad¬ vancement of the anterior portion of the head. But the organization of these parasitical species requires a renewed and more careful examination. The genus Ricinus, al¬ though furnished with mandibles, maxillae, and an inferior lip, has these parts greatly concentrated, after the manner of the Suctoria; and the labrum seems to perform the of¬ fice of a cupping glass, a character unique and unexampled in this class of animals, and one which, in combination with certain other features, indicates a peculiar type.6 These are the principal modifications exhibited in the 1 Plate CCXXXIII. Fig. 4 represents the mouth of Cimcx nigricornis; a is the articulated labium, with the eyes at each side, and the first joint of each of the antennae ; this is the sheath for the other organs, and exhibits the groove on its oral surface ; 6 is the sucker viewed from above, covered at the base for one third of its length by the tubulated labrum, and exhibiting at the extremi¬ ty the straight united tip of the maxillae, and the recurved ends of the mandibulae ; c is a view of the same parts separated, with the labrum removed to exhibit the expanded roots of the mandibulae and maxillae, the small opening of the pharynx, and the pointed lin¬ gua before it and between the maxillae. Fig, 6 represents the mouth of another hemipterous insect, the Nepa Neptunia of Savigny, the labrum and palate being removed. The mandibulae appear at the external sides, their summits with reflected spiculae, and their roots near the pharynx flask-shaped. The tongue (in the interior of the figure) is trifid at the apex, underneath which the maxillae arise, and exceed the mandibulae in length. The labium, or central anterior portion, exhibits the groove for the reception of the other parts, and the oval raised marks towards the narrow end are the (supposed) vestiges of palpi. 2 Diction. Ctassique d'Histoire Naturelle, t. ii. p. 434. 3 Linn. Trans, vol. xiii. p. 12. 4 Plate CCXXXIII. fig- 7, where we represent the parts of the mouth of Tabanus Italicus. At a the mouth is shown as if open¬ ed, or the labrum and the mandibulae and lingua separated, to expose the pharynx; b is one of the mandibulae viewed laterally; c is one of the maxillae with the articulated palpus, the last joint of which is greatly enlarged; and d exhibits the labium, with its fleshy lips. * Diction. Classique d'Hist. Nat. t. ii. p. 43t). 36 ENTOMOLOGY. External structure of the mouth by hexapod or true insects. In the Anatomy, opinion of Marcel de Serres, the parts named palpi (the antennulae of some authors) enjoy, at least in the Orthop- tera, a peculiar property, that of being the organ of the sense of smell. Lamarck again looks upon the palpi as ex¬ ercising the faculty of taste. Latreille regards these opi¬ nions as ill-founded, so far as concerns a great number of insects, such as those in which the palpi are non-existent, undeveloped, or extremely minute; but he views them in a more favourable light in reference to certain other spe¬ cies. Thus, among the Coleoptera of the sub-family of Xylotrogi, the maxillary palpi of the males are lacinated or pectinated like some antennae. In many other kinds the last article of the palpi is greatly dilated, and termi¬ nated by a pulpy substance. We have not hitherto attended to the singular order Strepsiptera of Kirby (Rhipiptera, Lat.), the characters of which were first given in the Linncean Transactions. If we regard the insects of this order as possessed of genuine mandibles, we must of course include them among the masticating tribes ; but as in many of the preceding orders, in which the parts of the mouth are feebly developed, the mandibles are observed to have become obliterated, there is reason to suspect that the parts regarded as such in Strepsiptera are rather maxillary, in which case the struc¬ ture would approach that of the lepidopterous kinds. We have entered into the preceding details in conse¬ quence of the great importance which is now attached to the study of the parts of manducation. Latreille indeed seems to be of opinion, that whenever it is possible to cha¬ racterize genera by more obvious organs, the minuter parts should not be had recourse to ; and he deems the principles of the Fabrician system liable to abuse, especially when Clairville’s example is departed from of employing only the mandibles and palpi. But the truth is, that the use of the compound microscope is scarcely ever required in these examinations; and it cannot be denied that a knowledge of such essential parts is indispensable in the formation of natural generic groups. The general physiognomy is fre¬ quently deceptive, and we can rectify our views only by recurring to influential organs. Thus the Sphex spirifer, and some analogous species which differ from their conge¬ ners in the mode of providing for their young, and which therefore form a good natural group, are also distinguished by an alteration in the structure of the mouth, but could scarcely be separated from the primitive genus by charac¬ ters drawn from any other parts. Besides the parts of the mouth, the head of insects pre¬ sents some other component portions which have received particular names. What Mr Kirby calls the nose is that upper and anterior portion to which the labrum is attach¬ ed, and which corresponds to the clypeus of Fabricius. (Plate C'CXXXIIl. fig. 1, a, upper portion.) The latter term was originally applied metaphorically to the expand¬ ed or shield-like covering of the head of the Scarabaeidae, and the expression was not inapt; but when it came to be used as a general term in relation to the structure of all other kinds, it lost its propriety of application. Hence the term nasas or nose has been substituted, as well as that of epistoma, which signifies the part above the mouth. Be¬ tween the nose and the labrum we find in many species the nostril piece or rhinarium of Kirby. It is very obvi¬ ous in a New Holland beetle, Anaplognathus viridiceneus. The postnasus may be seen under the form of a triangular piece, below the antennae and above the nose, and separat¬ ed from the latter and from the front by a deeply impress¬ ed line. It is very distinct in that splendid Chinese beetle the Sagra purpurea. The from or front of insects is the Externa* middle part of the face, bounded laterally by the eyes, an- Anatomy. terLorly by the nose or after-nose and the cheeks, and pos- teriorly by the vertex. The vertex is the crown of the head, and is bounded laterally by the hinder part of the eyes and the temples, and posteriorly by the occiput, when that part exists. It is the ordinary region of the stemma- tic eyes, although these peculiar organs are sometimes found to occur likewise upon the frons. The occiput, or hind head, is that part which either forms an angle poste¬ riorly with the vertex, or slopes downwards from it. It is bounded laterally by the temples, and posteriorly by the orifice of the head, or by the neck itself. The cheeks, gence, according to Kirby, usually surround the anterior part of the eyes, lying between them and the mandibles, or their representatives. The temples, tempora, form a continuation of the cheeks to the posterior limit of the head, forming its sides and posterior angles.1 The subfacies of an insect is the lower surface or under side of the head, and is composed, \st, of the lora, a corne¬ ous angular machine, upon the intermediate angle of which the mentum sits, and on the lateral ones the cardines or hinges of the maxillae; it is by means of this piece that the parts of the mouth (as in Hymenopterd) are pushed forward or retracted ; 2d, of the jugulum or throat, which is that part of the subface which lies between the temples. The collum, or neck, is that narrow portion of a peduncu¬ late head by which it is connected with the thorax.2 The next appendages of the head to which we have to direct the reader’s attention are the antennee. These are moveable articulated organs, never exceeding two in num¬ ber in genuine insects, although their form, and the amount of articulated portions, are extremely various. Their pri¬ mary use in the animal economy has not yet been ascer¬ tained ; at least a great diversity of opinion is maintained on the subject. In numerous tribes they seem to exercise a faculty analogous to that of touch, being employed in exploring the depth of crevices, and in ascertaining by con¬ tact the nature of any opposing obstacle; while, on the other hand, their extreme shortness in most Diptera, and in many of the neuropterous and hemipterous tribes, does not accord with that usage. Although of considerable importance in our systematic arrangement of insects, the development of the antennae does not seem subjected to any general or conformable rules, and is therefore of less value than that of several other parts of structure. For example, we frequently find a considerable difference to exist in the form of the antennae among species in other respects intimately allied; and even between the sexes of the same species a great disparity in size and structure is observable. Where a difference exists, those of the male are generally more developed than those of the female. The antennae of insects are usually composed of small cylindrical articulations, containing nervous threads, mus¬ cles, tracheae, and cellular tissue. Various terms are in use to express their form, consistence, and mode of inser¬ tion. They are regular when the articulations follow a gradual and progressive order in the modifications which they undergo ; irregular, when their forms alter suddenly; cylindrical, when rounded and of equal diameter through¬ out their length ; filiform, when the cylindrical shape is finely attenuated, like a thread or hair; setaceous, when lengthened, and diminishing insensibly from the base to the point; subulated or awl-shaped, when slender, but short, cylindrical at the base, and terminated by a stiff and sharp¬ ened point; moniliform, when each article is rounded like a bead, and of nearly equal thickness ; prismatic, when ap- 1 Introduc. to Ent. vol. iv. p. 489. * Ibid. p. 3GG. E N T 0 M External proacliing the form of a geometric prism ; ensiform, when Anatomy, broad at the base, and terminated by an angular point; fusiform, when shaped like a spindle ; serrated, when each article is terminated laterally by a sharp tooth directed forwards; 'pectinated, when these projections are straight, lengthened, and placed above each other, like the teeth of a comb ; ramose ox branched, when several appendages pro¬ ject from the main body of the antennae—they are regard¬ ed as simple when not in any way so adorned; perfoliated, when the articles are flattened from the summit to the base, and appearing as if strung on a thread through the centre (it is usually the terminal portion of the antennae that is so characterized) ; imbricated, when the articles are threaded as above mentioned, and concave at their sum¬ mit, so that each covers the base of that which follows; clavated or club-shaped, when thick or swollen towards the summit. The club is solid when its parts are not separat¬ ed by any apparent space; perfoliated, when composed of threaded articulations; lamellated or foliated, when the parts of the club are connected laterally, and admit of be¬ ing opened and closed like the leaves of a book; securi¬ form or hatchet-shaped, when the last articulation assumes the form of a compressed triangle, free at the base, but ar¬ ticulated by the apex. Antennae are also said to be un- cinated or hooked when the extremity suddenly bends itself towards the base; bifid, when divided into two; obtuse, when terminated by a round or blunted articulation ; truncated, when apparently deprived of a portion ; plumose, when thickly branched on either side, like a feather. Many other terms are in use to express the modifications of these important organs, most of which, however, are of a suffi¬ ciently familiar derivation to explain themselves. The antennae of the coleopterous order usually consist of ten or eleven distinct articulations. The latter number is the most frequent, although several genera present much fewer joints, as for example Paussus, in which there are only two. Others again have many more, such as a spe¬ cies of Prionus, of which the antennae of the female have nineteen joints, of the male twenty. In some orthopterous kinds these articulations amount to a hundred and fifty. The antennae are inserted on the front of the head, ante¬ rior to and rather beneath the region of the eyes. Their particular position varies, but they are always either in the space between the eyes, or that below them. As their va¬ rious forms, as characteristic of particular groups of species, will be afterwards described in the systematic part of the present treatise, we shall not here enter into further details of structure. The uses of these singular organs are vari¬ ously viewed by naturalists, and there seems even yet to be more hypothetical reasoning on the subject than pre¬ cise induction from facts. Some regard them as the seat of smell, others of hearing, a greater number as the organs of the sense of touch. The indurated nature of the outer covering in most insects would certainly lead us, a priori, to expect a special provision for the reception of the last- named sense. It is, however, extremely difficult, in the present state of our knowledge, to come to any general con¬ clusion on the subject. We shall state the prevailing opi¬ nions when we come to treat of the senses of insects ; and under that head we shall likewise explain the structure of the eyes. The thorax torms tlie second principal portion of an in¬ sect’s body. It is itself divisible into three parts, and its component segments vary greatly in their relative propor¬ tions in the different tribes; the division which is merely rudimentary in one particular group, being sometimes high¬ ly developed in another. These parts are named Xhoprotho- rax, the mesothorax, and the metathorax. The prothorax (from ergo, before, and thorax) is the anterior segment, and corresponds to the corselet or 0 L 0 G Y. 37 collar of M. Latreille; the second segiment is named me- Anatomy. sothorax (from peo-os, middle) ; and the third is known as \ ^ t the metathorax (from pera., after). Each segment may likewise be distinguished in reference to its inferior, its la¬ teral, and its superior portions ; and the whole united con¬ stitute the thorax, commonly so called. But although the general name of thorax is applied to the parts just named, yet the posterior two, that is, the mesothorax and the me¬ tathorax, are the most dependent on each other, and are always intimately united; while the prothorax, as exem¬ plified in the Coleoptera, is often comparatively free and distinguishable. It is this last-mentioned segment which bears the anterior pair of feet, and it considerably exceeds the others in extent. In the coleopterous order, indeed, it is the only part that is visible on the upper surface, the other segments, with the exception of the scutellum, being connected beneath it and the elytra. The mesothorax and metathorax unite strictly with the base of the abdomen, and serve as the points of attachment to the other pairs of feet. Of the mesothorax or central portion, the most ob¬ vious characters consist in its serving as a support to the second pair of feet, and to the elytra or first pair of wings. Its form, size, and consistence are extremely various. Slightly developed in the Coleoptera and Orthoptera, it is larger in the Hemiptera, the Neuroptera, and more especi¬ ally in the Hymenoptera, the Lepidoptera, and the Diptera. Its excessive increase is always associated with a condition more or less rudimentary of the other segments. Thus, in the three orders last named, the prothorax and metathorax are very restricted ; while, on the contrary, they are large in the Coleoptera, among which it is observable that the me¬ sothorax is always compressed and narrow. The meta¬ thorax serves as the point of attachment to the third pair of feet, and to the second or membranous pair of wings. We have said that each segment may be described in relation to its inferior, its lateral, and its superior parts. A piece named the sternum constitutes the whole of what is called the inferior portion. This is not, as too often sup¬ posed, an occasional projection, merely characteristic of certain tribes. It occurs in all insects, and forms a dis¬ tinct character, though more or less defined and perspicu¬ ous, according to the genus. It may be regarded as gene¬ rally composed of three distinct pieces, resembling in this respect the human sternum, which anatomists describe as consisting originally of three bones. Each of these pieces, according to Mr Kirby, is appropriated to a pair of legs, and each of them has been called the sternum; thus, in Elater the prosternum, in the Cetoniadse the mesosternum, and in Hydrophilus the metasternum, have alike been dis¬ tinguished by the name. Each of the ordinary lateral por¬ tions of the thorax is formed of two principal pieces, which, in combination with the sternum, is by some named the pectus or breast. The anterior piece rests upon the ster¬ num, and is hence called episternum (from wrl, upoii). The posterior lateral portion, called the epimera, is connected with the preceding ; it also adheres to the superior portion, and rests in certain cases on the sternum ; but it bears a constant relation to the haunches of the segment to which it belongs, and to these it articulates by means of a little piece afterwards mentioned by the name of trochantin. It derives its name from ivri, and pr^oi, thigh. Lastly, there exists on these same lateral parts a third piece, in general slightly developed, and sometimes imperceptible. It bears relation to the wing and episternum, always supports itself on the latter, is sometimes prolonged interiorly along its anterior margin, or, becoming free, passes in advance of the wing, or even places itself above it. It bears the name of paraptera, from waga, near to, and cmgoi/, wing. Three other portions of some importance may likewise be consi¬ dered as belonging to the general pectus. 38 E N T O M Externa 1a/, Above the sternum, on its internal face, that is, Anatomy, within the body of the insect, there exists a piece some- ' times remarkable for its size. It is placed on the median line, and generally takes its rise from the posterior extre¬ mity of the sternum. It assumes various secondary forms, and is generally divided into two branches. Cuvier named it the Y-formed portion, on account of his having observed it assume the shape of that letter. It is called entothorax by M. Audouin, from wroi, within, because it is always placed in the interior of that organ. It occurs in each seg¬ ment of the thorax, and seems to be in some measure a de¬ pendent on the sternum. Its uses are supposed to be the protection of the nervous system, and its isolation in many cases from the digestive apparatus and the dorsal vessel. The entothorax exists not only in the thorax, but in the head, in which case it is named entocephalus ; it has even been noticed in the first ring of the abdomen in the genus Cicada, and the portion named triangle ecailleux by Reau¬ mur may safely be regarded as its analogue. In this last condition it is denominated entogaster. 2d, On the anterior edge of the episternum, sometimes of the sternum, and even on the superior part of the body, a stigmatic opening is observable, surrounded by a small piece, of which the texture is frequently corneous. This is the peritrema, so called from 'vsg/', round about, and rprifia, a hole. It is not always perceptible, both on ac¬ count of its being sometimes too closely connected with the neighbouring pieces, and because the stigmatic open¬ ing is itself sometimes obliterated. But when visible, it is necessary that it should be distinguished, as its position is of importance, and becomes a useful auxiliary in the com¬ parison of parts and in the determination of analogies. 2>d, Lastly, it has been already stated in relation to the epimera, that it is connected with the rotule by means of a small articulation, of which the existence was first made known by M. Audouin. This is not an essential part of the thorax ; but as it accompanies the epimera, and is as¬ sociated with the parts of the leg, all of which have receiv¬ ed particular denominations, its first describer has thought proper to bestow upon it a name. He calls it trochantin, in distinction to trochanter, or that portion of the leg which is associated with the rotule and the thigh. The trochantin is sometimes concealed in the interior of the thorax, and is sometimes visible externally, according as the rotule is it¬ self more or less prolonged in its internal portion. The ascertainment of this piece, according to M. Audouin, ad¬ mits of a direct comparison between the limbs of insects and those of the Crustacea. Hitherto there were only five parts in the former (the tarsi being regarded as one), while there were six in the latter. But the trochantin completes the number six likewise among the insect tribes. We have now detailed the structure of the chest or pec¬ tus of insects ; so that whoever desires to view one of these creatures anatomically, should, after dividing the thorax into three segments, seek to ascertain, on the inferior and middle portion of each, the existence of a sternum, and on the flank or lateral portion, an episternum, a paraptera, and epimera. He will also study the structure of the entotho¬ rax, of the peritrema, and of the trochantin. Sometimes, however, the union of one or more of these parts with ano¬ ther is so intimate that they cannot be isolated or distin¬ guished ; but when we elsewhere, in such numerous cases, perceive that the pectus is formed of a certain number of elementary parts, it is more rational to believe that in all instances these same elements are made use of, than to suppose the frequent requirement of new. We shall next discuss the superior portion of the thorax of insects. In the coleopterous tribes the prothorax, as be- O L O G Y. fore mentioned, constitutes the principal portion, and its External upper part may be called the thoracic shield. The only Anatomy other part sufficiently distinguished prior to the time of M. Audouin, was the scutellum or escutcheon. It is highly developed in the Scutellerae, and rudimentary in most of the Hymenoptera, Diptera, Lepidoptera, and some other or¬ ders. Its apparent position between the wings has occa¬ sioned its being regarded too exclusively as a kind of point d'appui in flight. It is usually of a triangular form in the Coleoptera, and projects backwards from the mesothorax, with its point interposed between the elytra and the wings. The scutellum was adopted by Geoffroy as the basis of his arrangement of the genus Scarabeeus. It is, however, bv no means a well-chosen characteristic of the greater divi¬ sions in entomology; for the accurate distinction is not, as is usually supposed, whether the scutellum does or does not exist in a lamellicorn insect, but whether it is or is not apparent.1 It occurs very obviously among many of the coleopterous tribes, but is most conspicuously developed in that genus of the hemipterous order called Scutellera, of which Cimex lineatus may serve as an example. Natural¬ ists have erred in regarding this portion as characteristic of the mesothorax alone. It is often greatly developed in the posterior segment. Numerous and varied researches have led M. Audouin to conclude that this superior por¬ tion of the thorax is composed of four principal pieces, fre¬ quently isolated, sometimes intimately united, usually dis¬ tinct. He has deduced the following nomenclature from their relative position in regard to each other. The ante¬ rior portion is named the prcescutum; it is sometimes very large, and is usually concealed in whole or in part in the interior of the thorax. The second piece is called the scutum ; it is an important element, often strongly deve¬ loped, and always articulates with the wings when these exist. To the next piece the original term scutellum is applied ; it consists of the projecting angular point, gene¬ rally so denominated by entomologists. The fourth and last piece is called the postscutellum ; it is almost always entirely concealed within the thorax, sometimes united to the internal face of the scutellum, and confounded with it, sometimes free, and not adhering to the other portions, except by its lateral extremities. These are the parts which constitute the superior portion of the thorax, and to which the general term tergum may be applied. Thus we may speak of the tergum of the prothorax, of the me¬ sothorax, or of the metathorax ; but when the word tergum alone is used, we are then understood to signify the union of the superior parts, that is, the entire space comprised between the head and the first segment of the abdomen. We come now to the abdomen itself, an important por¬ tion in the animal economy. Anatomists in general appear to have advanced from the study of the human frame to that of animals, or at least to have applied to the parts of the latter the same terms which they had previously be¬ stowed upon the former. In so doing, however, they have been guided rather by the analogy of form than of func¬ tion, and hence the vague nature of many terms, as applied to the inferior orders, and which, however correct in their original signification, become either obscure, or altogether inapplicable in regard to other classes. The abdomen, among insects, is that part of the body which is attached to the posterior extremity of the thorax, composed of five or six rings or segments, unprovided with locomotive organs, and always containing within it a por¬ tion of the digestive canal. If, as many suppose, its exist¬ ence depends upon that of the thorax, then the entire class of Annelides or red-blooded worms may be said to be de-. prived of it, as the thorax itself does not exist in that class. 1 Horce Entomologies, part i. p. 9. ENTOMOLOGY. 39 External The term body is then made use of to designate generally Anatomy, the whole of the animal. Although the abdomen cannot w v''—' well exist without the thorax, the converse does not ap¬ pear to hold good, for the latter in many species seems to constitute the whole body. Many of the Myriapoda, such as lulus and Scolopendra, are examples of this ; for they are composed of a series of segments, all furnished with feet except the last, which has therefore by some been re¬ garded as the abdomen. But among genuine insects, that is, the hexapod or six¬ footed kinds, the abdomen is obviously developed, and, especially among the winged tribes, is very distinguishable from the thorax. Among the apterous species the distinc¬ tion is less perceptible; and the same may be said of most insects in the larva state. Among the hymenopterous kinds, such as wasps, bees, &c. it appears as if it were pediculat- ed or attached to the posterior part of the thorax by means of a slender stalk; but minuter and more accurate obser¬ vation demonstrates that this neck-like restriction actually takes place on the second segment of the abdomen, the first of which is much more spacious, but so closely attach¬ ed to the thorax by its anterior edges as to become undis- tinguishable. In the coleopterous order the abdomen is usually convex, and of a harder consistence beneath, where it is exposed ; but it is soft, and either flattish or concave above, where it is covered by the folded wings and elytra. On both sides of its segments there is a small roundish opening called the stigma, which serves for the introduc¬ tion of air for the purposes of respiration, and of which we shall treat in detail when we come to the consideration of that function. It has been noted that if an insect is naturally more ha¬ bituated to walking than flying, the breast or lower portion of the thorax is expanded, and is furnished with more power¬ ful muscles than the back; whereas, if flight is the more frequent mode of locomotion, an increase is observable in the dorsal muscles. The locomotive organs are of course the wings and legs, on which we shall now bestow a brief consideration. SECT. Ill ORGANS OF LOCOMOTION IN INSECTS. 1. The Wings. These organs exist, effectively, in insects only in the perfect state; for the larvae do not offer externally any trace of them, and when apparent in the nymph or inter¬ mediate condition, they are merely rudimentary. No in¬ sect has more than four wings, many have only a single pair, and others are entirely destitute of these parts. When four in number they may be regarded as anterior or supe¬ rior, and as posterior or inferior ; and we likewise talk of the first or of the second pair of wings. The coleopterous order presents some peculiarities in relation to these organs. The anterior pair (in all cases, as already mentioned, unit¬ ed to the mesothorax) consist of a hard or horny substance similar to the envelope of the thorax, and are called elytra. When closed, their junction usually forms a straight cen¬ tral line called the suture, which is rather apparent than real in certain species in which the inferior wings are wanting, and the elytra form a single undivided piece. They are convex above and concave below, are fixed to the mesothorax, and cover and protect the genuine wings, which are of a much more delicate structure. These lat¬ ter derive their origin from the metathorax, and are the actual organs of flight. They are membranous and trans- External parent, and when unemployed are transversely folded be- Anatomy neath their horny covering. We shall here describe the structure of wings, and explain the terms made use of to express the principal modifications which they undergo in their various degrees of development in the different orders. The wing of an insect consists of two thin flexible mem¬ branous transparent plates or leaves, the one superimposed upon the other, and variously intersected by darker lines of a horny consistence, usually known by the name of ner- vures. These nervures, which at first sight appear like su¬ perficial threads, of which the larger follow the longitudi¬ nal direction of the wing, are interposed between its mem¬ branes, and present two faces, of which the upper, fre¬ quently rounded and very horny, adheres closely to the corresponding leaf, and the under, of less firm consistence, and of a flatter form, may by skilful dissection be remov¬ ed from that portion of the wing by which it is covered. In the opinion of M. Audouin, these threads are in fact so many tubes, which diminish in diameter as they approach the summit of the wing, and each of which contains, throughout its entire extent, a spirally rolled vessel, by some regarded as a genuine trachea. These tracheae re¬ ceive air from the interior of the body, and their forma¬ tion, according to Swammerdam, whose views have more recently been confirmed and adopted by Jurine and Cha- brier, is to strengthen the wing by distending it during the action of flight. They are said to experience no sen¬ sible dilatation during their progress, whereas the corne¬ ous tubes which contain them present in that respect some curious modifications,—for they sometimes spread out suddenly, in such a way as to exhibit, for a short space, a comparatively broad diameter. The colouring matter being then disseminated over a wider surface, assumes so pale an aspect that the nervure which leads into one of those little expansions appears as it were interrupted. Hence the name of Indies d'air, or air-bubbles, bestowed upon the latter by the French entomologists. They oc¬ cur most frequently in the cubital nervures of many Hy- menoptera, and their chief use is supposed to be to facilitate the formation of certain foldings of the wing during the periods of repose. The largest of the nervures arise from the base of the wing, that is, from the point of its inser¬ tion in the thorax. A most skilful observer, the late M Jurine of Geneva, has described the wings of hymenopte¬ rous insects with great accuracy, in a memoir to which we shall make more special allusion when we come to treat of that particular order.1 The general character in respect to form and aspect of the wings of insects has received a great variety of names. They are sometimes equal, that is, all four of similar size ; or unequal, when one pair prevails over the other ; lanceolate, when they become narrow, both at the base and apex ; fal¬ cated, when curved like a scythe or reaping-hook ; linear, when narrow, with nearly parallel edges ; clavated or club- shaped, when linear in their general extent, but perceptibly enlarged towards their extremity ; rounded, when they ap¬ proach a more circular form ; oblong, when more lengthen- ened than broad, and describing an elongated ellipse, ob¬ tuse at both ends ; rhomboidal, when they are longer from the posterior angle to the summit than from that angle to the base; deltoid, when they assume the triangular form of the Greek letter delta; exserted, when the inferior wings pass beyond the elytra; covered, when entirely protected by those organs; plaited, when longitudinally 1 See Observations sur les Ailcs des Hymencpteres, in the twenty-fourth volume of the Mem. de VAcademic des Sciences de Turin. Consult also, by the same author, Nouvelle Methods de classer les Hymtnopteres et les Dipteres. Geneve, 1807. 40 E N T O M External folded, after the manner of a fan ; replicated, when, after Anatomy, being plaited as just mentioned, they are again folded 's—transversely upon themselves ; incumbent, when the poste¬ rior margin of one covers that of the other ; extended, when, in a state of repose, they are stretched on either side, leav¬ ing the abdomen visible ; erect, when, in a state of repose, they are raised perpendicularly to the surface of the body ; deflexed, when the summits and outer margins form as it were a kind of inclined plane from the base and inner margins. These are the principal variations as to form and attitude, or position. The following terms are ot fre¬ quent use in entomology, when the surface or superficial structure of the wings is sought to be described. They are striated, when certain raised lines are perceptible, forming slight parallel and longitudinal furrows ; reticulated, when these lines are disposed like lace or network ; veined, when distinct longitudinal nervures are observable, rami¬ fying into more delicate branches ; squamous or scaly, when covered with minute powdery particles, which, when ex¬ amined with a glass, are found to be small scales imbri¬ cated or imposed on each other like slates or tiles on a house top ; farinose, when sprinkled more irregularly with fine particles resembling flour, and easily removeable by the finger ; pilose or hairy, when the surface is more or less covered by minute hairs ; naked, when there is no covering of either hairs or scales. Other characters are deduced from the markings of the wings in regard to tint and colour. They are concolorous, when similar or unvaried in their hue ; vitreous or windowed, when, opake over their general surface, certain translucenc spots are here and there obser¬ vable ; ocellated, when they present circular spots of different colours, resembling an eye ; pupillated, when the eye-like spot has a coloured point in its centre ; fasciated, when there are broad coloured lines or bands,—and these are distinguished as transverse, longitudinal, oblique, lanceo- lated, &c. according to their prevailing direction and cha¬ racteristic form. The margins or edges of the wings have likewise re¬ ceived a considerable variety of designations, according to the peculiar characters which they exhibit. They are crenated, when they present an alternation of slight inci¬ sions and obtuse projections ; dentated or toothed, when these incisions are deeper and narrower, and the projec¬ tions sharper and more defined; fimbriated, when the marginal processes are lengthened, pointed, and close ; cloven, when the incisions are few and deep; digitated, when the parts cut into assume the aspect of a hand; emarginate, when the incision is slight, and seems merely to have scooped out a small portion of the wing ; caudated or tailed, when the posterior margin presents a more length¬ ened appendage; ciliated, when the wings are bordered by close-set hairs resembling eye-lashes. The points of the wings are obtuse, when terminated by a rounded out¬ line ; truncated, when they appear as if cut; acute, when ending in a point; acuminated, when that point is sharp and prolonged. These details, we doubt not, like all the other technica¬ lities of a complex branch of science, must seem irksome to the general reader. Nevertheless, as they frequently form important and sometimes indispensable elements of knowledge, we must continue their enumeration. The wings, in fact, have furnished the characters from which the names and definitions of the orders in entomology have been derived, and a knowledge of their forms and func¬ tions is required during almost every step of our progress. A transcendental anatomy has no doubt thrown its ambi¬ guous light (lucus a non lucendo) upon these and other portions of animal economy; and the wings, which in for¬ mer times were thought sufficiently defined when merely named as the organs of flight, are now regarded by some O L O G Y. as legs, and by others as lungs. We still see, however, External that they carry the creatures through the air, and we shall An^totny. therefore rest satisfied by viewing them in accordance with our accustomed associations. Among the more remarkable of the modifications expe¬ rienced by the upper wings, is that corneous condition in which they are known under the name of elytra. These are particularly characteristic of the coleopterous order, and derive their name from sXvTgev, a sheath or covering, be¬ cause they protect the membranaceous wings. They are attached by their base, by means of several small pieces, to the mesothorax. The opposite extremities are called the points or summits, and the margins are known as ante¬ rior or external, posterior, and interior,—the last named, when the parts are closed, and meeting over the back, forming what is called the dorsal suture. As to their pro¬ portions, they are elongated, when they exceed the ab¬ domen ; abbreviated, when shorter than that organ ; and various other terms of obvious application are made use of to express their different degrees. The elytra differ in their consistence, being sometimes almost membranous, or scarcely firmer than the under wings; or they are coriaceous, or of the texture of lea¬ ther ; semi-coriaceous, when, as among many Hemiptera, the elytra are composed of two parts of different texture ; pergameneous, or like parchment; flexible, when, yielding to a slight impression, they yet return again immediately to their original shape ; or soft, when they yield to the same impression, but retain the alteration of form for a longer time. As to form, many of the terms already enu¬ merated in relation to the wings in general, apply equally to the elytra. They are also gibbous, when greatly round¬ ed or hemispherical; dilated, when more flatly expand¬ ed ; attenuated, when they diminish in breadth from the base to the apex. The surface of these parts presents many characters of great importance in the discrimina¬ tion of species, and even in the formation of sections or subdivisions of genera. They are said to be chagrined, when covered by minute raised spots; punctated, when these spots are distinct and hollowed; tuberculated, wdien the elevations are distinct and irregular; scabrous, when the elevations are distant and unequal; verrucose or warty, when they are large, cicatrised, and resembling warts; striated, when marked with regular longitudinal lines; striato-punctate, when in each stria there are depressed points; punctato-striate, when the striae are themselves formed by a consecutive series of these impressed points j sulcated or furrowed, when the impressed lines are deep and broad; ribbed, when between the furrows there are raised lines; rugose, when the raised lines are irregular, and divided in all directions ; reticulated, when these lines are disposed with greater regularity, in a kind of network ; crenated, when the lines are rather regularly undulated; glabrous, when the elytra are smooth, or destitute of raised points or other irregularities of surface; tomentose or cot¬ tony, when covered by a whitish down ; pilose, when hairy, —also villous ; fasciculated, when the hairs are collected here and there in little tufts; muricated, when the hairs are long, raised, and almost prickly; spinous, when the projecting parts are hard and sharp like spines ; squamous or scaly, when covered by little scaly plates. The elytra are said to be margined when their edges are raised, or otherwise distinguished from the general and more central surface ; sinuated, when there are sloping notches on their outline ; serrated, when furnished with little sharp projections like the teeth of a saw ; dentated, when these are sharp and more distant. They are like¬ wise said to be mucronated when the apex is provided with a sharpish point; bidentated, when there are a couple of distinct projections ; obtuse, when the summits are blunt or ENTOMOLOGY. External rounded; truncated, when they seem as if a portion had Anatomy, been severed. We have already mentioned, that in many of the hemip¬ terous order the anterior wings are semi-ehjtrous, that is, comparatively solid in one part of their extent, and mem¬ branous in the other. In fact, the order derives its name from that character, as already mentioned in our in¬ troductory definitions. In the orthopterous order the an¬ terior wings, though much more membranaceous than those ot beetles, yet approach the nature of elytra, and serve as a protection to the under pair, which are more delicate. Among neuropterous insects both pairs of wings are alike in their general character of texture and reticulation, and the same may be said of the hymenopterous order. Those of the Lepidoptera are also similar to each other in their substance and covering. With a few exceptions, in which the wings are clear or diaphanous, in the last- named gorgeous group they are thickly coated with mi¬ nute scales of various colours, which when removed exhi¬ bit the membranous structure of the parts. They present several other peculiarities, which we shall notice when we treat of the generalities of the greater divisions of which the order is composed. The wings, regarded throughout the entire series of hex¬ apod insects, are thus extremely varied in their form, con¬ sistence, development, and efficiency. The distinctions, both of form and texture, show themselves, as it w^ere, by gradation, and present no striking disparity among species otherwise nearly allied. But the uses, and degrees of de¬ velopment, of these organs, vary greatly not only among species of the same genus, but even between the sexes of the same species ; for while the males of several kinds are efficiently winged, the females are entirely apterous. When the anterior wings, as in the Coleoptera, are elytrous (if we may use the expression), they scarcely serve for the purposes of flight. In the neuropterous and hymenop¬ terous orders both pairs are equally efficient, while in the dipterous or two-winged tribes the inferior wings have disappeared. In some cases, as among the female ants, the wings fall off immediately after the sexual union. The development of the wings always bears a relation to that of the superior arc of the thorax by which they are supported. It has been already noted, that if an insect is more habituated to walking than flying, the breast or lower portion of the thorax is extended, and is furnished with more powerful muscles than the back ; whereas if flight is the means of locomotion, an increase of power is observ¬ able in the dorsal muscles. One of the laws laid down by M. Straus Durckheim as regulating organic structure is the following :—that when one organ governs another, or several others, these follow the march of the dominating organ ; and that when the latter disappears, those which were subordinate to it im¬ mediately assume their primitive form. This law may be exemplified by the influence of the wings upon the thorax. In proportion as the two pairs of wings change in form and size, the two segments of the thorax which support them follow the same progression, and become more and more united to each other ; but no sooner do the wings disap¬ pear in the Aphaniptera (Pulex), than the two segments of the thorax regain their primitive form, and separating from 41 one another, present the same appearance as in Lepisma. External The wings being first introduced amongst the Coleoptera, Anatomy, and the thorax of these as yet differing but little from that of the fhysanura, it can easily return to the form it pos¬ sessed previously to its undergoing any modification. It thence follows, that in such species as are deprived of wings, the thorax returns more or less to its primitive form. This is particularly remarkable in the females of many species of Lampyris, which possess neither wings nor elytra; and this return is moreover occasioned in the Coleoptera with¬ out wings by another cause, which acts in this case on that part of the body; it is the diminution of the soli¬ dity of the integuments in those parts which are covered by the elytra. In the other order of insects, according to the views of the last-named author, the two segments which bear the wings having already experienced a very considerable change of form, it would require a very powerful cause to bring them back to their primitive form; for this reason the return does not take place in Cimex cellularius, the For- micae, &c. amongst which the imperfection (if it may be so called) is only specific. In the Aphaniptera, on the con¬ trary, which we may in some respects consider as wingless Diptera, the transformation of the thorax takes place in consequence of a complete absence of the wings, brought about by the degradation which these organs have expe¬ rienced in passing through the whole of the class Insecta. M. Straus Durckheim, in the introduction to his care¬ fully elaborated work,1 has also endeavoured to explain the laws which regulate the different changes of structure in passing from one group to another. The most general law in the organization of animals which he has recognised is, that all the systems of organs are subjected to a constant varia¬ tion of form, and even of function, while passing from one family to another. The first more special or particular law which he evolves from the subdivision of the former is the following: That the organs at one extremity of the scale always exercise a very evident function ; whilst at the other extremity they are constantly rudimentary and without function, and at last entirely disappear. He here distin¬ guishes two kinds of cases. In the first, the organs pre¬ sent themselves at the head of the scale developed to the highest degree of which they are susceptible, and decrease insensibly, until they arrive at the other extremity of the scale. Thus, for example, the posterior wings of insects are “ introduced suddenly” into the organization of that class at the highest point of perfection in the Coleoptera, where they alone serve for flight. In the Orthopteraand Hemip- tera they already begin to divide their function with the elytra, and go on diminishing gradually until they exist merely as rudiments in the Diptera, where they are repre¬ sented by the halteres.2 Finally, they entirely disappear in the Aphaniptera. In the second instances, the organs do not appear at the head of the scale in their most perfect state of development, and only acquire it by degrees. Such is the case with the elytra, or first pair of wings, which follow a course exactly contrary to that of the infe¬ rior wings. They only appear at first as organs slightly accessory to flight, in which state they remain nearly throughout the whole Coleoptera. In the Orthoptera and Hemiptera they begin already to take a very active part in 1 Considerations Generates stir VAnatomis Compares des Animaux articules, auxqudlcs on a joint l'Anatomic descriptive du Hanneton, 1 vol. 4to, ayec planches, Paris, 1828. An abstract of the doctrines of this work will be found in the Entomological Magazine, vol. i. ' 2 I he name of Halteres, poisers or balancers, is bestowed on a pair of slender moveable appendages found on the hinder part of the thorax in dipterous or two-winged insects. They are usually regarded as the rudiments of the second or posterior pair of wings, ‘‘halteres rudimenta alarum posticarum,” as Fabricius has expressed it in hisEntnmologia Philosophica. This opinion, however, is be¬ lieved by others, and we think with reason, to be founded rather on the position which these organs bear in relation to the anterior wings, than on their connection with the metathorax and its different parts. Latreille, a great authority in such matters, maintains that the balancers do not correspond to or represent the second pair of wings, but are rather vesicular appendages connected with two posterior tracheae of the thorax, and analogous in some measure to the processes which accompany the respiratory organs of the Aphro- 42 Externa] Anatomy. ENTOMOLOGY. flight, but still preserve their primitive use. In the Neu- roptera, particularly the Libellulina, they attain the develop¬ ment of the inferior wings, from which they differ but very slightly. From this point they continue to surpass them, until in the Diptera they become the sole organs of flight, and of course have there attained their highest degree of perfection. Arrived at this culminating point, they sud¬ denly diminish in Hippobosca, and entirely disappear in Pulex. We shall next devote a few lines to those portions of the wings called ailerons by the French naturalists, known also under the name of winglets or alulce.1 They are chiefly characteristic of the dipterous tribes, and may be regarded as appendages of the anterior wings, the sole pair in that particular order. Their attachment to the scutellum and the postscutellum of the mesothorax is sufficient evidence that they are not the rudiments of a posterior pair ; for these, if they existed, would derive their origin from the metathorax. * They usually consist of two concavo-convex pieces, intermediate as it were between the wing and the poisers, and folded the one upon the other, like the parts of a bivalve shell when the insect is at rest, but stretched or extended during flight. Their special uses are not yet known. The poisers or balancers (halteres) have been sufficient¬ ly described in the preceding note. Audouin regards them as the rudiments of the second pair of wings, of which the extreme tenuity in the Diptera accords in his opinion with the evanescence of the metathorax.2 Their use, like that of the last-named organs, seems not to have been satisfactorily determined. Dr Derham and others have thought that, like the pole of a rope-dancer, they keep the body steady in flight; while some connect them with the noises produced by insects, and maintain that they act upon the membrane of the winglet, as a drumstick acts upon its proper organ, thus producing sound. Shelver’s opinion is probably more correct, that they are connected with the function of respiration.3 But the various senti¬ ments on the subject are as yet conjectural. 2. The Legs. Having now endeavoured to explain the structure of the wings or organs of flight, we shall next request the reader’s attention to those other organs of motion, the legs of in¬ sects. With the exception of the Myriapoda (Centipedes, &c.), which, with Latreille and Dr Leach, we shall form, as already noted, a separate class, the number of legs in in¬ sects is precisely six. They are composed of the follow¬ ing parts : ls£, The coxa or haunch, which is the first joint, or that which plays in the socket (Plate CCXXXIII. fig. 2, a); 2d, the trochanter or second joint, to the side of which the thigh is attached, and by means of which it inosculates with the coxa (Ibid, b); 3c/, the femur or thigh, which is long, and usually compressed (c); Mh, the tibia or shank, generally the longest joint of the leg, and frequently notched on its edges, and terminated by spur¬ like appendages (d); bth, the tarsus, composed of articu¬ late portions, varying from three to five among the Cole- optera and the majority of insects (e). The last articula¬ tion of the tarsus bears the ungues or claws (/). M- Au- Internal douin and some other French naturalists seem to use the ®tructure* term haunch (hanche) as a collective designation, including an internal portion formerly noticed, called trochantin, along with the rotule (our coxa), and the trochanter. In accor¬ dance with this view, the parts of the leg in insects may be said to amount to six pieces, instead of the five which we have just enumerated. These terms apply strictly to the intermediate and hind legs. The anterior pair are by some writers regarded as brachia or arms. The first joint of the brachium, answering to the coxa of the legs, is named da- vicula, or the clavicle, by Mr Kirby; its second joint, an¬ swering to the trochanter of the other limbs, is called the scapula; the third and elongated joint, corresponding to the femur, is designated the humerus; while the articulations of the tarsus are known as the manus or hand. However, the majority of authors seem not to express any distinction between the parts of the fore legs and those of the inter¬ mediate and hind ones. The anterior pair, we may ob¬ serve, are in some cases convertible into organs of prehen¬ sion, and their tarsi are frequently dilated in the male sex. The number of articulations of the tarsi varies in the dif¬ ferent tribes, and is not always the same in the different pairs of legs in the same insect. Their amount on each limb has been assumed as a basis for the formation of the great sectional divisions of the coleopterous order, as ori¬ ginally proposed by M. Geoffroy, and so generally adopted by the continental naturalists. The character, though ar¬ bitrarily chosen, and not seldom artificial in its results, has proved upon the whole more compatible with a natural ar - rangement than usually happens on the selection of a sin¬ gle and uninfluential organ. W e shall enter into further details in relation to this matter in our introduction to the coleopterous order, and shall merely observe in the mean time, that pentamerous species, or those of which all the tarsi are furnished with five articulations, are the most abundant,—more than one half of the coleopterous kinds being referable to that section. These are the principal external parts of the structure of insects.4 Their internal conformation has been illustrat¬ ed of late years by the successful efforts of several very skilful and ingenious observers. We shall here notice the dominating or more influential organs, and give a short view of the important vital functions which they exercise. CHAPTER III. THE INTERNAL STRUCTURE AND PHYSIOLOGY OF INSECTS. SECT. I. THE NERVOUS SYSTEM AND SENSES OF INSECTS. The nervous system of animals in general, it has been remarked, is one of the most wonderful and mysterious works of the Creator. Its pulpy substance is the visible medium by which the governing principle (To ’Hy^oiz/xov) transmits its commands to the various organs of the body, which instantaneously obey the impulsive mandate ; yet this appears to be but the conductor of some higher principle, or dites, or those of the aquatic larvae of Ephemerae and the genus Gyrinus. He founds his opinion chiefly on this, that the inferior wings always take their origin from the lateral and anterior summits of the third thoracic segment, at a very short distance from the superior wings, and alw'ays in advance of the two posterior stigmata of the thorax, whilst the balancers are inserted lower dowmat the internal extremity of these air-conduits, or close by them. tSee Latreille’s observations in the 7th and 8th volume of the Memoires du Museum d'Histoire Naturelle.') 1 We have made use of the term wing-scale in the systematic exposition afterwards given of the order Diptera. Meigen uses the German word schuppchen (squama) in his Zweiflugeligen Insecten. 2 Diet. Class, d' Hist. Nat. t. ii. p. 141. 3 Wiedeman’s Archiv. ii. 210. 4 For some additional details, we beg to refer to a paper entitled “ Osteology, or External Anatomy of Insects,” by Mr New¬ man, in the Entomological Magazine, No. 1Y. We had not an opportunity of consulting it until our own abstract had been composed, chiefly from foreign sources. ENTOMOLOGY. Internal more ethereal essence (language is ransacked in vain for an Structure, appropriate term), which can be more immediately acted upon by the mind and will. But this supposed principle, by whatever fond or fantastical name it may be known, whether as a nervous fluid or a nervous power, has never been detected by the most subtile physiologist, and is known only by its effects. It is, however, undoubtedly the centre from which all power and function flow; and during the absence of worthier substitutes we need not challenge the vague abstractions of some metaphysical inquirers. The nervous system of insects consists of a homogeneous pulp, usually disposed in tw'elve successive ganglions, con¬ nected by a double cord. We first observe a double or bi- lobed mass, which, as it is placed in the head, may be call¬ ed the brain. It is surrounded by strong muscles, and from its anterior portion nerves are distributed to the eyes, antennae, and mouth. Posteriorly two delicate recurrent nerves proceed towards the dorsal vessel, and inferiorly two larger nerves, after having formed by their branching a kind of ring, which embraces the oesophagus, unite in the form of a ganglion beneath the last-named organ. From the posterior part of this latter ganglion a pair of nervous cords proceed for a space, and then by their union produce a second inferior ganglion, from which the nervous cords again branch off posteriorly, and so uniting and ramifying from space to space, they extend through the different seg¬ ments of the thorax and abdomen. The number of these ganglia varies; sometimes they correspond to the divisions of the body, while in many instances they are of smaller amount. In the larva of the rhinoceros-beetle, for example, the whole spinal cord (so called from its supposed analogy to the part known by that name among the vertebrate kinds) presents the appearance of a single ganglion, divid¬ ed merely by transverse furrowrs,—while in that of a dra¬ gon-fly, six have been observed in the thorax, and seven in the abdomen. In the great water-beetle {Hydrous pi- ceus) the head exhibits one ganglion, the thorax six, and the abdomen only two. In the honey-bee there are three ganglia in the thorax, and four in the abdomen. When we examine these knots attentively, we may perceive that, in addition to the double and longitudinal nervous cord by which they are connected, they throw off laterally on either side small nervous trunks, which divide into branches, and finally ramify over the muscles, the intestinal canal, the tracheae, and other parts. This nervous system differs considerably in the larva and perfect insect, In the lat¬ ter the ganglia are usually less numerous, and the poste¬ rior appear formed by the close approximation of several others. The principal ganglia of the nervous system of insects are frequently thus disposed. The position of the upper or cervical ganglion has been already mentioned. The others rest beneath the intestines, ranging along the infe¬ rior face of the body. There are three in what may be called the chest; that is, one in the prothorax, which sends nerves to the anterior legs; one in the mesothorax, which supplies the elytra or the upper wings, and the middle legs ; and one in the metathorax, which distributes its filaments to the second pair of wings and the last pair of legs. The other ganglia belong to the abdomen. Insects are charac¬ terized by the ganglionic distribution of the nervous sys¬ tem, in common with the Crustacea and Arachnides on the one hand, and with the Vermes or worms on the other. But in insects the ganglia are larger and less numerous than in the still lowrer tribes, which gives a more decided character of centricity to their nervous system. Indeed the highest manifestation of this character is usually pre¬ sented only as the ultimate result of several metamorphoses; so that while the larva exhibits a closer agreement with the nervous system of worms, that of the imago or perfect in¬ sect assumes a higher development. It does not however appear that the brain or upper ganglion of insects acts in the capacity of a sensorium commune, as among warm¬ blooded animals, such as mammiferous quadrupeds and birds; for many insects will live for a considerable time, and even exercise their faculties of flight, after the loss of parts which among the other class we justly regard as of vital importance. The tenacity of life in horse-flies, for example {Hippoboscce), is very remarkable. When deprived of their heads, and replaced upon a horse, they will be per¬ ceived to run backwards and forwards and sideways, with apparently the same ease as prior to their decapitation.1 The ganglions themselves frequently exhibit a bilobed structure, which appears to result from the union of two smaller masses, originally distinct. Comparative anatomy tends to confirm this supposition. M. Marcel de Serres2 maintains that the nervous system of insects, and of all in¬ vertebrate animals, corresponds to the eccentric portion of that system among the higher classes, that is, to the in¬ tervertebral ganglia and their radiations.3 In the primi¬ tive state of larva he deems the nervous system to consist of two distinct portions, a right and a left; and he main¬ tains that the formation of the nervous system in all ani¬ mals proceeds from the circumference to the centre, and not, as usually supposed, from the centre to the circumfe¬ rence. We know well, from the observations of Carus and Tiedeman, that the organs of the inferior animals repeat, as it were, the forms which present themselves only in the embryo condition of the higher tribes. M. de Serres en¬ deavours to show that it is by the progress of successive developments that the portions of the nervous cord in in¬ sects approach each other,—that they first join around the oesophagus, then at the opposite extremity towards the in¬ ferior ganglions, and lastly in the central parts. He thus admits three distinct embryo states in the condition of the larvae; first, that in which the two portions of the nervous system are entirely isolated and distinct; secondly, that in which the cesophagian ganglia are alone united; and, thirdly, that in which the opposite extremities arejoined together. By means of this distinctive view, the French physiologist connects the nervous system of insects with that of the Mollusca, the latter presenting the embryo con- 1 Entomological Magazine, No. iii. 301. 2 Ann. des Sciences Nat. t. iii. p. 377. 3 The relation which the nervous system of invertebrate animals bears to that of the vertebrated tribes has, however, given rise to many conflicting opinions. “ Among the various suggestions on this point, are that of Ackermann and Reil, who viewed the nervous system ot Articulata as corresponding to the sympathetic system of vertebral animals;—of Walther, who compared it in the Mollusca to the par vagum, and in the Articulata to the spinal marrow;—the most generally received opinion, however, is that supported by the authority of Meckel, Cuvier, Blumenbach, Gall, and Spurzheim, who compare it in the Articulata to the cerebro¬ spinal cord of vertebral animals. The latter gentlemen, in particular, have furnished a strong proof of the correctness of this idea, by demonstrating that the spinal cord of the superior animals actually consists of a series of ganglia with intermediate contractions,—a structure most fully developed in the Articulata. Rudolphi {Physiologic, b. ii. s. 8, 1823) adopts the same opinion, and notices the fact, that in Mollusca, Crustacea, Insects, &c. we find nerves of sense arising from the cerebral ganglia,—which by no means accords with the character of the sympathetic system.” (See Note to Carus’s Comparative Anatomy, by Gore, vol. i. p. 89 ) E. W. Weber {Anatomia Comparuta Nervi Sympathetici) appears to have been the first to suggest that the ganglia on the knotted spinal cord of ar¬ ticulated animals correspond to the intervertebral ganglia of the spinal nerves of the higher classes, rather than to the segments of which their spinal marrow is composed. 43 Internal 44 I nternal Structure ^ ENTOMOLOGY. dition of the former, that is, being permanently distinguish- • ed by a characteristic which is only temporary among tiie articulated tribes. This may probably be regarded as an additional argument in favour of what we shall afterwards endeavour to maintain,—the general superiority in the scale of organization of the annulose classes over the molluscous kinds. We shall conclude by observing, that besides the general protection afforded by the external envelope of in¬ sects to their nervous system, it is specially protected by the Y-shaped portion formerly described. As the nerves constitute the principal media of sensation in all animals, we shall here give a short sketch of the dif¬ ferent senses of the insect class. Of the senses in general, as they exist in man and the higher beings, physiologists and metaphysicians alike enu¬ merate the following five, viz. touch, taste, smell, hearing, and sight. All of these, we doubt not, exist in the class now under consideration, although we are not in every case acquainted with the special organ by which each particu¬ lar function is exercised. The sense of touch is usually regarded as affording ani¬ mals, and man especially, a more intimate and assured com¬ munication with the external world than those of either sight or hearing, in as far as no intermediate substance comes between us and the subjects of perception. Ihe perfection of the sense depends on the quality of the skin, the extent and nature of its surface, the number of its nerves, its freedom from insensible parts, and the delicacy of those appendages which are more particularly destined to the examination of bodies. As touch is the most im¬ portant of all the senses, it may naturally be inferred to be finely developed in the human race ; and we know that, of all the vertebrated animals, man in that respect is one of the most highly organized. But among the invertebrate kinds the sense of touch improves in proportion as the others de¬ generate ; and those which have no other sense possess it so exquisitely that some of them seem even to feel the light.1 Among insects the sense of touch varies remarkably ac¬ cording to the condition in which they happen to exist for the time,—their exterior surface, in which the function exists, or at least through which it must be manifested, being itself subject to great variation, even among indivi¬ duals of the same species. When soft, as in the larva state, the skin is extremely delicate in its perceptions, and capable of transmitting the most lively sensations; while in the imago or perfect condition, more especially among the Coleoptera, its harder consistence renders it chiefly service¬ able as a protecting covering. In this case the feet, palpi, and, as many suppose, the antennae, seem the principal organs of the sense of touch. The sense of taste, which some regard as an exalted modification of the perception of touch, is very obvious among insects. We see many species, while searching af¬ ter food, reject or only partially consume whatever is dis¬ agreeable or unexpected, while they gloat over a more favourite morsel. The organ in which the sense is placed is not, however, so easily determined. Some regard the palpi, and others the pharynx, as its principal seat. That portion of the labium which the French naturalists name the languette or ligula, has also been regarded as exercis¬ ing the sense of taste. It is certain that distinct nerves are distributed to that quarter, as represented by Lyonnet in his great work on the caterpillar of the cossus. The sense of smell is exquisitely developed in the insect tribes. No sooner has an animal fallen, from age or sick¬ ness, even on the loneliest and most barren moor, where perhaps no vestige of insect life was previously perceptible, Internal than troops of flies and carcass-eating beetles assemble Structure, from every quarter, led by the emanation of the tainted air. It was in truth the influence of the sense of smell that in ancient times no doubt gave rise to so many erroneous ideas regarding the origin of insect life. Every animal body in a state of decay being seen to present a crowd of small larvae or worms, these were regarded as the produce of corruption, whereas they resulted naturally, and accord¬ ing to the usual course, from eggs previously deposited by parent flies or beetles, which had been attracted by the putrid effluvia. It is not two hundred years since Redi proved for the first time, by conclusive experiments, that this was true. It is also known that bees will discover and hover around a box containing honey, though their prized treasure is screened from sight; and both flies and beetles are so affected by the perceptions of this sense, that even their peculiar and all but unerring instincts are occa¬ sionally deceived by its influence. They will deposit their eggs on plants which are characterized by a foetid smell (for example, on the Phallus impudicus), misled by the resemblance of their flesh-like odour, which the experience of the sense of sight cannot rectify. The scent of many flowers is cadaverous, and is thus the means of assembling around their deceptive petals nu¬ merous insects which feed on putrid matter. It is thus that the spathes of the Arum dracunculus, and the corolla of the Stapelia variegata, are frequently found covered by Silphae, flesh-flies, and other species, which not only at¬ tempt to feed upon them, but also deposit their eggs in what they conceive to be a fitting station. But the seat of this indispensable faculty is likewise still involved in ob¬ scurity. On a subject so difficult of solution, and which can only be solved by a consummate knowledge of anato¬ mical structure, viewed in relation to the uses of physio¬ logy, it would not become us to offer an opinion, or do more than report the sentiments of those who are neces¬ sarily more experienced than ourselves. Many agree with Dumeril in maintaining that in insects the sense of smell is effected, as among the higher animals, through media in very intimate connection with the process of respiration ; in other words, that either the trachece or stigmatic open¬ ings are the seat of its exercise. Others again suppose, that for the exercise of so important a function, a more special and concentrated organ is required; and proceeding upon the analogical relation of mere position, they regard the antennae as its seat. These receive the first pair of nerves, and so far correspond to the olfactory organs of the higher animals, which are likewise connected with the brain by means of the first pair. The question is one which is extremely difficult of determination, especially in reference to the singular experiments of Huber on bees, which go far to prove that the sense of smell, at least in these hymenopterous species, is placed in the cavity of the mouth. Christian maintained that insects exercised the sense of smell in relation to distant objects through their antennas, and in regard to near ones by means of their palpi; while Comparetti imagines that in the different tribes of insects different instruments are subservient to that end. Cuvier, at least in his earlier works (and we are not aware of any recorded change in his sentiments) favoured the opinion already alluded to regarding the respiratory organs. “ As the organ of smell,” he observes, “ in all animals which respire air, is situated at the entrance of the organs of re¬ spiration, the most probable conjecture that has been pro- 1 Lefons d'Anatomic Comparte, sect. 14. ENTOMOLOGY. 45 Internal posed respecting its seat in insects, is that of Baster, since Structure, revived by several naturalists, who placed it in the mouths w,'V'w/ of the tracheae or air-tubes. In addition to the reasons hitherto stated in support of this opinion, we may observe that the internal membrane of the tracheae appears very well calculated to perform this office, being soft and mois¬ tened, and that the insects in which the tracheae en¬ large, and form numerous or considerable vesicles, are those which seem to possess the most perfect sense of smell. Such are the Scarabaei, flies, bees, &c. The an¬ tennae, which other anatomists have supposed to be the seat of smell in insects, do not appear to us to possess any of the conditions for that organ.”1 Huber’s experiments, undertaken with a view to as¬ certain the seat of smell in bees, consisted in presenting successively to all parts of their bodies a hair pencil dipt in oil of turpentine, an article which they particularly abominate. When made to approximate the head, trunk, or abdomen, it produced no particular effect, and the odour appeared to be equally disregarded by the antennae and proboscis. But when he brought the point of a fine hair- pencil saturated in the oil almost into contact writh the ca¬ vity of the mouth, above the insertion of the proboscis, the bee started back in an instant, quitted its food, clapped its wings, and would have taken immediate flight had not the pencil been removed. A repetition of the experiment pro¬ duced the same signs of discomposure ; and similar re¬ sults, but more prompt and sure, followed the use of oil of marjoram. The indefatigable Genevese observer then stopt up the mouths of several bees with paste, which soon became comparatively hard and dry. In this state they were quite insensible to those odours which had pre¬ viously produced such painful effects.2 Mr Kirby maintains an opinion different from any w-e have yet alluded to, though more allied to the last than to the others. As the nose of an insect evidently corresponds with the part so named in the Mammalia, not only in its situation, but frequently in its form, and as a constant con¬ nection may be observed to obtain between the senses of smell and taste, he felt convinced in the first place that the argument from analogy was wholly in favour of the nose, or anterior portion of the head formerly men¬ tioned under that name. The common burying beetle (Necrophorus vespillo) is an insect remarkable for its ex¬ treme accuracy and acuteness of smell. While examining the nose of this insect, Mr Kirby observed in the middle of its anterior part a subtrapezoidal space, as it were cut out and filled with a paler piece of a softer and more membra¬ nous texture. On dividing the head horizontally, he per¬ ceived beneath the nose, and partly under the space just mentioned, which he calls the rhinarium or nostril piece, a pair of circular pulpy cushions, covered by a membrane transversely striated with beautifully fine lines. These are what our learned author regards as the organs of smell, and he noted that they remained distinctly visible in a specimen which he had had by him for more than fifteen years.3 Hearing is perceptibly acute in some insects, and of more doubtful existence in others. The frequent and va¬ rious sounds to which many species give utterance have been adduced in proof of their being endowed with this perception ; for we cannot but suppose that the shrill voice of the grasshopper, and the evening song of the cricket, are subservient to some essential end, which they cannot Internal well be if unheard by their blythe companions. The small Structure, wood-devouring beetle called the death-tick (Anobium), answers its neighbour’s call as regularly as a cock crows a response to its pugnacious rival; and Derham, when he kept these insects in captivity, by imitating their tiny call, could make them click when he pleased. What is called the voice in insects is usually produced by the friction of certain hard and horny parts of the limbs upon some other portion of the body of a like consistence. In others it is effected by a rapid vibration of the wings; and a few beetles seem to give utterance to a shrill and sometimes plaintive cry by ruDbing the terminal segments of the ab¬ domen against the curved points of the elytra. This power of voice, as we call it for want of a better name, is often possessed by the males alone; and as it is used as a call of love in spring and summer (most obviously so among the Cicadae), we infer the sense of hearing in the females of that family, and consequently in the class of in¬ sects. Brunelli kept some large green grasshoppers (Acrida vi- ridissima) in confinement. They used to sing all day in a closet, but ceased when any one gave a rap upon the door. He learned by degrees to imitate their chirping call. At first a few of the boldest would answer him, and then gradually the whole band would strike in and sing with all their might. On one occasion he inclosed a male in his garden, and gave the female her liberty ; but no sooner did the husband begin to solace his captivity with a song than his quondam partner recognised the accus¬ tomed voice, and flew towards him without delay.4 In i-e- lation to this subject Dr Wollaston makes the following cu¬ rious observation. “ Since there is nothing in the consti¬ tution of the atmosphere to prevent vibrations much more frequent than any of which we are conscious, we may ima¬ gine that animals like the Grylli, whose powers appear to commence nearly where ours terminate, may have the fa¬ culty of hearing still sharper sounds, which at present we do not know to exist; and that there may be other insects, hearing nothing in common with us, but endued with a power of exciting, and a sense that perceives, vibrations indeed of the same nature as those which constitute our ordinary sounds, but so remote that the animals who per¬ ceive them may be said to possess another sense, agreeing with ours solely in the medium by which it is excited, and possibly wholly unaffected by those slowrer vibrations of which we are sensible.”5 The precise position, however, of the organ of hearing in insects lias not been determined with precision. In the Crustacea it is found at the base of the large antennae ; and Latreille has satisfied himself of its existence in a similar situation in an orthopterous insect called Gryllus lineola. Mr Kirby is of opinion that the primary use of the antennae is to exercise a function analogous to that of hearing, and Mr Rennie entertains a similar sentiment. The sense of sight is too obvious in this class to require demonstration. The eyes of insects are, however, of a very different nature and construction from the exquisite¬ ly formed visual organs of the higher tribes. They con¬ sist of two kinds, the composite and the simple. The lat¬ ter, known under a certain form likewise by the name of ocelli or stemmatic eyes (stemmata), are sometimes wanting, sometimes co-existent with the others.6 1 Comparative Anatomy, vol. ii. p. 687. 8 NOlivettes Observations sur les Abeilles, t. ii. p- 375. * Introduction to Entomology, vol. iv. p. 254. * Lehmann, De Scnsibus Extends Animcdium Exsanguium, 22. s Phil. Trans. 1820, p. 314. 6 What Messrs Kirby and Spence name conglomerate eyes do not essentially differ from simple eyes, collected together in a com¬ pact bundle. They occur in Lepisma, and many Myriapoda. 46 E N T O M Internal The composite eyes generally form, as it were, the lateral Structure, portions of the head. They are either entire, notched, or even occasionally so completely divided by a little corneous stalk, as to exhibit (for example in the genus Gyrinus) the appearance of a pair on either side. In other respects their forms are extremely variable—their surfaces more or less convex. These compound eyes are composed externally of a hard and transparent membrane (softer in the dipte¬ rous tribes), which presents an infinity of small hexagonal surfaces, disposed with the most exquisite regularity. This peculiar structure prevails equally on the concave or inter¬ nal, as on the convex or external surface. The structure and composition of the eyes of insects have been carefully stu¬ died and explained by Leeuwenhoeck, Swammerdam, Cu¬ vier, and more lately and laboriously by Marcel de Serres. We shall here avail ourselves of the resume given by M. Victor Audouin.1 In the eye of an insect we observe, ls£, a cornea (convex in proportion to the carnivorous habits of the species), transparent, hard, thickish, gene¬ rally encased in a groove of the head, and exhibiting many thousand regularly disposed, hexagonal facettes, each of which is in itself a perfect eye. These are sometimes so numerous that not fewer than 34,650 lenses have been counted in the head of a butterfly, and the coleopterous ge¬ nus Dynastes of Macleay is supposed to be still more won¬ derfully and exuberantly supplied. 2d, An opaque, slight¬ ly liquid matter, variously coloured, frequently deep violet or black, but sometimes red or green, tenaciously adhe¬ rent to the inner face of the cornea, and distinct from the deep-black varnish of the choroid. It is by no means rare to observe various colours united in the same eye, which then appears beautifully mottled, as in many species of the orthopterous, neuropterous, and dipterous orders. These tints, however brilliant in the living state, speedily vanish after death. They are always owing to this peculiar coat¬ ing of the cornea. 3r/, A true choroid, covered by a dark varnish, which may be regarded as a pigmentum nigrum. The lynx-eyed Swammerdam failed to distinguish this coating from that of the cornea; but, in the opinion of Marcel de Serres, it is really different. The choroid and its pigment do not always exist in insects. They are want¬ ing in the Blattce, and in all the lucifugous or light shun¬ ning species, such as those of the genera Slaps, Tenebrio, and Pedinus. In these cases, it has been remarked that the covering of the cornea is much deeper than usual. The choroid membrane is fixed by its circumference to all the margin of the cornea, of which it follows the contour, and is intimately connected with the tracheae, which are there so numerous, kth, Air vessels which play an important part. They take their rise from larger trunks which are situated in the head, and form around the eye a circular trachea, which sends forth an infinity of branches, produ- cing by bifurcation a number of isosceles triangles. These triangles, of which the base is outw ards, are placed around the optic cone, and receive, in each angular interval which separates their summits, a nervous filament, which traver¬ ses the choroid, and reaches the external surface of the covering ot the cornea. The assemblage of tracheae and nervous threads forms at the circumference of the eye a peculiar kind of network, of which the aspect is beautiful to look upon. The tracheae themselves are so abundant on the choroid, that that membrane appears to be compos¬ ed of them ; and it may also be noted, that in those genera in which the choroid is wanting, the circular trachea is likewise absent.2 bth, Nerves arise from a principal O L O G Y. branch which, after proceeding immediately from the brain Internal (or upper ganglion), is either encompassed by a little cir- Structure, cular trachea, or traverses the fibres of the abductor mus- cle of the mandibles. This branch soon augments in volume, and forms a kind of cone more or less extended, of which the base is towards the transparent cornea. Nu¬ merous nerves proceed from that base, mingle with the tracheae of the choroid, traverse both that membrane and its pigment, penetrate the lining of the cornea, and finally terminate each on a facette of the transparent cornea, so that the nervous filaments are thus immediately in contact with the light, which reaches them after having traversed only the last-named organ. This disposition of the ner¬ vous threads, which thus constitute as many small retinae as there are facettes in the cornea of the eye, is very distin¬ guishable in Libellula, Truxalis, and Gryllus. The eyes of insects, then, contain no humours properly so called,— neither vitreous nor crystalline,-—and vision is consequent¬ ly much more simple with them than with the vertebrated tribes, in which the nerves are placed deeper in the eye, and do not receive the rays of light till these have passed through media of different densities. The simple or stemmatic eyes of insects are usually three in number, and are placed on the crown of the head, be¬ tween the genuine organs of sight, from which their struc¬ ture differs. In spite of their extreme minuteness, Mar¬ cel de Serres has succeeded in detecting the following component parts. Is#, A transparent cornea, formed by an external membrane, hard, convex externally, and smooth, that is, exhibiting no appearance of facettes. 2d, Of a va¬ riously-coloured matter, which lines the internal face of the cornea, but which is perhaps not essentially distinct from the varnish of the choroid. It varies in colour, be¬ ing almost always black in Hymenoptera, usually whitish in Orthoptera, and, in many caterpillars, yellow, red, or green. 3c?, A kind of choroid, rather thick, more extend¬ ed on the surface than the cornea itself, sometimes of a black colour, more frequently red, and occasionally of a peculiar whitish hue. 4#/«, Tracheae, which do not derive their origin from a circular air vessel, and do not, as it were, constitute the choroid, but appear to be distributed over its surface, bth, Nerves proceeding either directly from the brain or upper ganglion, or from another more considerable nerve or common trunk, according as these simple eyes are separate from each other, as in perfect in¬ sects, or closely approached, as among larvae. In their pas¬ sage towards the eyes they are attached to the neighbour¬ ing parts by tracheae or air vesicles, and do not appear to present any swelling ; they pass between the motive mus¬ cles of the different parts of the head, traverse the choroid and its varnish, and expand upon the internal face of the cornea, where they are surrounded by the layer of pig¬ ment belonging to that membrane. Thus, on examining the simple or stemmatic eyes of insects, and proceeding from the circumference to the centre, we meet with a transparent cornea,—a pigment, which lines its inner face,— the termination of the optic nerves,—the pigment of the choroid, when distinct from that of the cornea,—and the choroid itself, which frequently rests upon a large trachea. The principal character of these simple eyes consists in this, that each is a single organ, whereas the composite eyes, as the name implies, are formed by the union of many. The one kind is most characteristic of the larva state, the other of the perfect insect; but several orders, even in the last-mentioned condition, possess both organs. 1 Diet. Class. d'Hist. Nat. t. viii. p. 554. ’ Muller and others appear to entertain a different view from that given above. The subject is one of considerable complexity, and our present limits prevent our entering into its various and sometimes contradictory details. We refer the curious reader to a series of papers on the visual organs of insects and Crustacea in the fourth volume of the Naturalist's Magazine. ENTOMOLOGY. 47 Internal Thus, with few exceptions, the Orthoptera, Hemiptera, Structure. Hymenoptera, Neuroptera, and Diptera, possess both sim- pie and compound eyes. Dr Carus however states that the stemmata do not exist either in beetles or butterflies; a most erroneous opinion in regard to the latter, in which they exist universally, although not always detected; and incorrect as to the former, in several of which they have been distinctly seen. They are visible in Gravenhorst’s genus Omalium, or at least in some of the species j1 and Mr Kirby found them very conspicuous in A. Caraboides, and other Anthophagi. They are wanting in Strepsiptera, Derm- aptera, and Aptera. Although neither Linnaeus nor Fabricius, those great masters in the science, gave any explanation of the uses of the stemmata, there can be no doubt that Swammerdam and Reaumur were correct in regarding them as genuine eyes.2 The French writer supposes that the compound organs have the power of magnifying, and are used for sur¬ veying more distant objects, while the simple ones possess little of that power, and are employed on objects close at hand. Blumenbach is also of opinion that the polyhedral eyes are for viewing distant objects, and the simple ones for such as are near.3 This is in some measure confirmed by the fact, that while most insects in the perfect state have large compound eyes, caterpillars and other larvae have usually small myopic ones. On the other hand, the Mole cricket (Gryllotalpd), a truly subterranean species, is furnished with both kinds. Reaumur’s experiments on the visual organs of bees are extremely important in rela¬ tion to our present subject. He smeared the compound eyes with paint, when the insects, instead of directing their flight towards the hive, ascended in the air till they were lost to sight. He then treated the stemmatic eyes in the same manner, and placing his patients near their hive, they winged their way on all sides among the surrounding flowers, but neither ascended into the air, nor flew far from home. From these experiments it has been supposed that the compound eyes are for horizontal sight, and the stem¬ matic for vertical.4 Spix imagines that what we call sim¬ ple eyes in insects are in fact olfactory organs.5 Nothing can be adduced in support of a theory so fantastical. We shall conclude this branch of our subject by observ¬ ing that some insects are supposed to be entirely destitute of eyes. This is the case, according to Rudolph!,6 with the coleopterous genus Claviger, in which there are cer¬ tainly no apparent eyes; and Marcel de Serres observes, “ un assez grand nombre de larves a metamorphose com¬ plete n’ont point d’yeux du tout.”7 SECT. II. THE RESPIRATORY SYSTEM IN INSECTS. Though insects respire air, they do not receive it, like the majority of vertebrated animals, through nostrils or other ori¬ fices in the head, but by means of numerous small openings along the sides of the body, and which lead not to lungs, but to a system of air vessels ramified ad infinitum through every part of the body. The respiratory organs of this class are composed of stigmata, trachece, and bronchia. The first, called also spiracles or breathing pores, consist of small perforations of various forms, placed along the lateral portions of the body, and generally incased externally in a small corneous ring, though sometimes pierced in the mem¬ brane which separates the dorsal from the ventral surface. These stigmatic openings occur both on the thorax and abdomen, and lead inwards to the tracheae. Their num¬ ber varies according to the species, and even in the same Internal species according to the temporary condition of the indivi- Structure, dual. They are wanting on the second and third segments of the body of the larva; and as it is from these segments that the wings are developed, M. de Blainville has been induced, probably by that circumstance, to regard the or¬ gans of flight as reversed and expanded tracheae. The existence, however, of stigmatic openings on the thorax of the perfect insect simultaneously with the wings, militates against this theory ; for if these parts were convertible, would they not be likewise each exclusive of the other ? Parallel with the sides of the body of most insects, and extending its whole length, run two cylindrical tubes, which communicate with the spiracles, and give issue, at points opposite to those organs, to other tubes, the ramifications of which are distributed over all the membranes, penetrate the muscles, and pervade even the legs and wings. They also envelope the dorsal vessel and digestive organs, and demonstrate that the ultimate aim of respiration is assimi¬ lation, or the increase and reproduction of organic mole¬ cules, by the decomposition of food. The first of these tubes are called the tracheae, the latter the bronchiae. This structure, however, cannot be regarded as universal, as in many of the lamellicorn beetles the bronchiae spring directly from the spiracles, the interior mouth of which is lined by a membrane from which they proceed.8 But a volume would scarcely suffice to describe the beautifully varied features of the respiratory system in insects. Among those tribes especially which pass their early stages under water, the changes in form and position in these organs cannot be sufficiently admired. Several common species of gnat, the larvae of which abound during the summer season in all our ponds and marshes, will afford a familiar illustration. When one of these is examined, a singular tunnel-shaped organ, terminating in a radiated point like a star, will be perceived, forming an angle with the penulti¬ mate segment of the body. In the interior of this organ is a tube, which conveys the air to the tracheae, and com¬ municates with the atmosphere by means of several perfo¬ rations in the centre of the star. The diverging rays of the star suspend the animal at the surface of the water, with its head downwards, till it wishes to descend. It has no sooner assumed the pupa state, than the respiratory tail disappears, and the insect (still an inhabitant of the water) then breathes through two projecting horns, each resembling a little cornucopia, which proceed from the upper part of the trunk. Ere long the skin of the pupa bursts asunder, and the perfect gnat, or winged insect, makes its appearance, with neither caudal nor thoracic ap¬ pendages, but breathing by means of numerous lateral pores (the stigmata above mentioned), after the usual man¬ ner. The rat-tailed worm in this respect is still more ex¬ traordinary. In the larva state it breathes through a tail formed of retractile tubes, like a telescope, and capable of being extended many times the length of the body. This also terminates in a star-like process, which, when viewed in a strong light, forms a perceptible dimple on the surface of the water ; and as the body of the insect lies in the mud below, the tail is contracted or extended according to the varying depth of its stagnant habitation. On assuming the pupa state, in which it is no longer an aquatic animal, the respiratory tail is cast off, and its function performed by four horns, which spring from the upper part of the thorax. It afterwards becomes one of those bee-like flies so remarkable for the rapid vibratory movement of their 1 Mas;azin der Entomologie, iv. 410. * See Biblia Naturae, i. 214; and Memoires, iv. 245. 3 Vergl. Anatomic, p. 425. 4 Introduction to Entomology, ill. 505. * Cephalogenesis, p. 57. 8 Physiologic, ii. 154. 7 Mem. sur ies Yeux composes etles Yeux lines. 8 Introd. to Ent. vol. iv. p 61. ENTOMOLOGY. 48 Internal wings, by which, during calm sunshine, they are often seen Structure, suspended in the air like hawks, without any perceptible motion. In this last stage respiration is carried on by spi¬ racles or breathing-pores. SECT. III. THE DORSAL VESSEL, OR SUPPOSED CIRCULATING SYSTEM, OF INSECTS. We shall next endeavour to explain the construction and physiological uses of the organ known by the name of dorsal vessel. The primary use of the heart of animals is the elabora¬ tion of the nutritive fluid by which the general system is strengthened and sustained; its secondary use is to effect the circulation of that fluid, a process by which important changes are produced in its nature or attributes. The dorsal vessel, which corresponds to the heart in insects, certainly effects the primary purpose; its performance of the secondary one is, as we shall see, a matter of greater dubiety. When an insect is dissected with due precaution from its inferior surface, and we remove the nervous system, which first presents itself, and then the intestines and other viscera, we shall observe running along the back, a pecu¬ liar vessel, of which the most obvious powers are those of contraction and dilatation. It is of a cylindrical form, narrowed at either end, and extends from the head to the anal extremity. This constitutes the heart, frequently so called, of the class of insects. A closer examination shows that it is composed of two membranes, one internal and muscular, the other external and cellular, and pervaded by a close interlacement of tracheae or air-vessels. When opened, its interior presents a transparent ccagulable li¬ quid, which dries rapidly, and then exhibits the aspect of gum, of a colour seldom deeply defined, but sometimes greenish, orange yellow, or sombre brown. Masses of fat frequently surround this vessel, and partake of the tint by which it is pervaded. If, as Marcel de Serres has noted, the dorsal vessel (for so this organ is often named) were a genuine heart, or centre of a circulating system, it would be necessarily open at one or other of its extremities, and would present vascular ramifications in certain points of its extent. But, according to the minute and laborious inves¬ tigations of the last-named author, no such openings are observable. The same view was taken by Swammerdam ; and Lyonnet, so unrivalled in his examination of the struc¬ ture of insects, was foiled in his attempts to demonstrate the ramifications of the dorsal vessel. Comparetti no doubt took another view of the subject; and if the assurance of his readers was equal to his own, less suspicion would exist of the possibility of his having mistaken biliary for san¬ guineous vessels. Anatomists, however, are greatly divided in opinion re¬ garding the essential nature of this organ. It has been dissected and injected by Marcel de Serres in a variety of species ; but in none could he discover its divisions or ra¬ mifications. Even when he removed it entirely from the insect, no drop of the liquid which it contained was ob¬ served to escape, which he thinks it must have done on the cutting away of open vessels during dissection, had these existed. The heating of this dorsal vessel was not explicable, otherwise than by the contraction of its tissue, or the movement of the fluid which it contained; and such movement was not itself conceivable except in the case of circulation, which the alleged closure and non-division of the organ forbade us to suppose. Its contractions also appeared irregular, and scarcely ever isochronic; that is, the same number ol pulsations, if they may be so called, did not take place in an equal time. They varied singu¬ larly in different species. Thirty-six per minute wrere counted in the caterpillar of the Pavonia Major, eighty- Internal two at least in grasshoppers, and a hundred and forty in Structure, one of the ground bees. While endeavouring to discover the cause of these contractions, Marcel de Serres came to the conclusion that they bore a relation, \st, to the quan¬ tity ot adipose tissue by which they were surrounded; 2dly, to the energy of the muscular fibres which were in¬ serted on the vessel, and were the means of fixing it to the rings of the abdomen; Sdly, to the number of tracheae or air conduits by which it was supplied. He was not of opi¬ nion that the nerves exercised any strongly marked influ¬ ence on these contractions, although we know that special nerves are directed to the dorsal vessel. The fact, how¬ ever, which he deemed the most clearly established, was the influential action of the muscles. When any of these were removed, the pulsations became less frequent,—on a farther removal they still diminished ; and when the muscles were almost all withdrawn, the pulsations ceased. 1 he appropriate function of this disputed organ, according to the last-named author, is the secretion of fat. Baron Cuvier also denies to it the character of a genuine heart. Meckel and Herold, on the other hand, regard the dorsal vessel as a heart, and they conceive that the use of its movement is to agitate the fluid contained in the cavity of the insect’s body; but they do not admit the existence of posterior or anterior openings for the reception or rejec¬ tion of that fluid. It is long since Lyonnet informed us that it contained a gummy matter of an orange colour ; and some recent observations have led Latreille to admit the existence of certain very minute accessory vessels. In ad¬ dition, however, to the fact that this circulation must be extremely partial, insects would still greatly differ in that respect from the Crustacea, inasmuch as the blood does not return to the heart. Herold is of opinion that the trian¬ gular muscles ot the dorsal vessel serve for its dilatation, while the systole movements are effected by the muscular fibres, which form the proper tunic. Straus is also of opi¬ nion that the dorsal vessel is the true heart in the class of insects, and that it serves, as in the higher animals, as the motive organ of the blood, which, however, instead of being contained in vessels, permeates in the general cavity of the body. According to his views, it terminates ante¬ riorly by a single unramified artery, which conveys the blood to the head, where it pours it out, and from whence it returns again to the abdomen, to re-enter the dorsal ves¬ sel. He thus limits the circulating system of insects to a single artery without branches (there are not any veins); and he combats the sentiments of Herold regarding the muscular nature of the wings of the heart, which, he main¬ tains, are only simple fibrous ligaments, by which it is main¬ tained in its proper place. The heart itself, that is, the ab¬ dominal portion of the vessel, he describes as divided inte¬ riorly into eight successive chambers (as in the common cockchafer, Melolontha vulgaris), separated from each other by two convergent valvules, which permit the transmission of the blood or circulating fluid from behind forwards, and from one chamber to another, up to the artery which con¬ ducts it to the head, but prevent its retrograde motion. Towards the lateral and anterior portion of each chamber are two transverse fissures, which communicate with the abdominal cavity, and through which the blood contained in the latter enters the heart. Each of these apertures is provided internally with a little semicircular valve, which presses on it during the systole of the organ. When the posterior chamber dilates, the fluid contained in the abdo¬ minal cavity penetrates into it by the transverse fissures, called auriculo-ventriculaires by M. Straus. When the chamber contracts, the blood, unable to return into the abdominal cavity, forces the ewfer-ventricular valve, and passes into the second chamber, which dilates to receive it, E N T O M Internal along with an additional quantity which enters by the true Structure, auriculo-ventricular openings. The second chamber then c’ontracts in a similar manner, and forces the fluid into the third, which at the same time also receives a supply from the lateral openings; and thus the blood is forced from one chamber to another by successive contractions, till it reaches the artery. These are said to constitute the move¬ ments so distinctly perceptible through the dorsal skin of many caterpillars. Mr Bowerbank has recently published some observations on the circulation of the blood in insects.1 The instance detailed was that of the larva of an Ephemera (Z?. margi- natd). In fixing the insect for examination (under water), especial care must be taken not to compress the body, which impedes or interrupts the circulation of the lateral vessels, and that of the tail, legs, and antennae. When the larva is fixed, with its dorsal aspect towards the observer, a truly beautiful sight is said to present itself. The blood, abounding in flattened oat-shaped particles, will be seen circulating in every part of the body, not in a continuous stream, but at regular points, in accordance with the pul¬ sations of the great dorsal vessel. The latter, which is of great comparative magnitude, extends nearly the whole length of the body, and is furnished at regular intervals with double valves, nearly equal in amount to the segments of the body. Both above and below each of these sets of valves there is a pair of irregular-looking appendages, which are probably nervous ganglions, auxiliary to the motions of the vessel, but so extremely translucent as to be scarcely definable in their form, even through the medium of the highest power which we can apply. The action of the valves is singularly interesting. While in their greatest state of collapse, the point of the lower valve is seen close¬ ly compressed within the upper one. At the commence¬ ment of the expansion of the artery, the blood is seen flowing in from the lateral aperture, and at the same time the stream in the artery commences its ascent. When it has nearly attained its greatest state of expansion, the sides of the lower valve are forced upwards by the increased flow of the blood from the section below the valve, the lateral openings are closed, and the main current of the blood is projected through the two valves. The structure of the upper valve appears to consist of a duplication inwards and upwards of the inner coat of the artery ; that of the under, of a contraction and projection of the like parts of a por¬ tion of the artery beneath, so as to come within the grasp of the lower part of the valve above it. The exterior por¬ tion or continuation of the artery is perceptible in the form of an exceedingly fine and transparent membrane. The so-called blood does not appear to be confined within any specific vessels prior to its entering the lateral openings just mentioned, because, as soon as they expand, the par¬ ticles are seen converging towards them. The wdiole of the fluid received throughout the course of the dorsal ves¬ sel is conveyed to the extremity of the anterior part of the body, where the vessel makes a curve inwards, and is lost to view. To all appearance the main current of the blood is now discharged into the cavity of the body, as it is seen pursuing its course downwards in a wide-spreading stream on each side, and beneath the dorsal vessel. As it de¬ scends, portions are again absorbed by the valves of the large vessel, while at the same time smaller vessels pass down each side of the body, and convey another portion of blood to the lower extremity. These lesser vessels have perceptible boundaries, and are certainly not portions of the great abdominal cavity. They communicate at each junction of the segments of the body with that cavity, as a O L O G Y. 49 part of the fluid they convey is discharged at those points, Internal to supply the place of what is absorbed by the valves of Structure, the dorsal vessel, into the lower end of which they empty their contents. In the caudal extremity the ascending and descending vessels are seen, like vein and artery, to accom¬ pany each other, and at the same moment that the fluid passes up the one with the usual pulsatory motion, it de¬ scends the other. There is, however, no perceptible pul¬ sation of these minuter vessels themselves, and the motion of their fluids therefore results from the action of the great dorsal heart. “ Next to the larvae of the Ephemera marginata,” Mr Bowerbank observes, “ the larvae of Agrion afford the best view of the blood and its circulation. In all the species of these larvae I have yet examined, I have found it as near¬ ly similar as possible in appearance to that which we ob¬ serve in the Ephemera, and in some instances it has afford¬ ed even more satisfactory results. The head of this larva is much more transparent than that of the larva of the Ephe¬ mera ; we therefore have a better view of the circulation of the blood in the head of this insect than can possibly be ob¬ tained in the other. In this object the blood is seen rushing like a beautiful intermittent fountain towards the mouth, and dividing right and left into two jets, a portion of each of which flows within a given boundary past the back of the eye, whilst the remainder winds its way through other channels, deep in the side of the head, and returns again into the body. The antennae of this insect also afford another beautiful instance of the circulation being carried forward within well-defined vessels. They are each composed of six joints, up four of which the blood is seen to take its course ; and turning round the extremity of the fourth joint, it re¬ turns by a distinct vessel into the head. In the leg, like¬ wise, the circulating fluid and its vessels are clearly and distinctly to be traced, even to the very extremity of the tarsus, where, as in the antennae, the particles of the blood are seen to descend on the one side of the leg, and, turn¬ ing the extreme point, to return up the contrary side to the one by which they come down. I regret much that I have not yet had an opportunity of examining the Ephe¬ mera in its perfect state ; but in two species of Culex, one of which was first observed and brought to me by my friend Mr Tulley, I have seen the great dorsal vessel performing its functions in a manner similar in every respect to its ap¬ pearance in the larvae of Ephemera, Agrion, &c. &c.; but, from the body of the fly being more opaque than that of the larvae, and nearly covered with its striated scales, neither the valves nor the particles of the blood could be detect¬ ed. On another occasion, after having carefully cleared the wings of Phlogophora meticulosa of their coloured scales, both Mr Samouelle and myself clearly saw a fluid pass down the side of one of the principal ribs of the wing. We may therefore, I think, fairly conclude, that the circu¬ lation is carried forward in the perfect insect as well as in the larva, although, perhaps, not with so much vigour as when young and growing.”2 The writer whose observations we have just quoted, in¬ clines to the opinion that a much greater portion of the circulation than we can clearly define is carried on within special vessels, as the blood may be frequently seen flow¬ ing in curved and other lines, as if confined within very narrow limits. These streams, however, are generally so deeply seated amidst the muscles and intestines as totally to prevent their boundaries from being clearly seen. The blood itself is in fact a perfectly colourless and transparent fluid, rendered visible only by its containing a number of oat-shaped particles ; and even the great dorsal vessel can- 1 Entomological Magazine. No. III. p. 239. VOL. IX. G 2 Ibid. p. 242. 50 E N T G M Interral not be seen distinctly but by means of a glass of great power, Structure. anf]? under the most favourable circumstances, exhibits de- fine(j limits with certainty only when in motion. A singu¬ lar coincidence is observable between the flattened particles of the blood of insects, and the circular double concave plates in that of man,- namely, that the former, in common with the latter, assume a globular form immediately on com¬ ing into contact with water.1 The reader will be able to judge, from the preceding notices, of the diversified opinions still entertained regard¬ ing the circulation of the blood in insects. We shall con¬ clude with a short account of Dr Carus’s observations, w hich many consider as the first of a satisfactory and con¬ clusive nature on the subject. Mr Spence, the accomplish¬ ed coadjutor of Mr Kirby, having had the advantage, at a pretty recent period, of witnessing some of the most strik¬ ing facts on which the Dresden physician rests his views, transmitted an account of them to an English periodical. “ The first insect,” he observes, “ to which Dr Carus di¬ rected my attention wras the larva of Ephemera vulgata (or an allied species), in which, near to the branchiae, and pa¬ rallel with each side of the body, w^as very distinctly visible a constant current, towards the tail, of oblong globules, swimming in a transparent fluid, propelled with a regular pulsating motion ; and in cutting the body of the larva across, near the tail, these globules wrere most plainly seen pushed out of the divided vessels in a distinct mass, wEich increased at each pulsation. I cannot express the plea¬ sure which it gave me to see thus clearly this ocular de¬ monstration of one of the most important physiological dis¬ coveries of modern times ; and my gratification was height¬ ened by the next object which Dr Carus placed before his microscope, viz. a specimen of Semblis viridis, in which precisely the same phenomena, but if possible more clear¬ ly, were seen in the nervures of the wings, and in the an¬ tennae, in both which the constant current of globules was most apparent; and in the former, the sudden turning of these globules at the apex of the wing, out of the exte¬ rior nervure, into a central one, with which it joins and forms an acute angle, was equally curious and striking. On cutting off the end of the antennae, precisely the same emission of globules (winch soon assume a greenish tint) took place as in the former case, forming a mass which was increased with a sudden gush at each pulsation.”2 The chief point to be attended to in the manipulation of these microscopic experiments, is to place the specimens on the slip of glass, in a drop of pretty thick gum water, which confines their too agile movements, without affecting the transparency of the medium. SECT. IV. OF THE ADIPOSE TISSUE OF INSECTS. Insects are abundantly supplied with an adipose sub¬ stance or fatty matter, which may be mentioned in this place with the more propriety, as many consider it a secretion from the dorsal vessel. It is spread over the viscera and in the splanchnic cavities ; and although its aspect varies, it seems to consist essentially of membranous w oofs, in some cases divided in shreds, in others spread over the intes¬ tines and against the sides of the abdomen, and containing pouches filled writh a homogeneous pulpy matter, sometimes in an oily condition, and offering all the characters of grease. Much more of it is observable among larva; than in perfect insects, and this observation leads us to a know- o L o G Y. ledge of its use. It is particularly plentiful just before an Internal insect is about to undergo its metamorphosis; and as it al- Structure, most entirely disappears on the completion of those signal changes, we naturally conclude that it has served in the pro¬ duction or development of the newly acquired organs. This is rendered the more probable when we consider that, dur¬ ing the intermediate or nympha state, the insect abstains from food, and is therefore necessarily dependent on some internal reservoir. It is analogous, in fact, to the store of fat which is known to pervade the system of hybernating animals before they consign themselves to their winter sleep. In regard to the nutrition of insects, our opinions must be in a measure regulated by the sentiments which we may adopt as to the functional uses of the dorsal vessel. We need scarcely observe, that in all the higher animals, and in most of the invertebrated tribes, nutrition is effected through the medium of the blood, which, propelled by the heart, circulates through the entire system, and reaches every organ, after having been submitted to the action of the air in lungs or gills. Cuvier thinks it is carried on among insects by imbibition. The alimentary canal ela¬ borates a fluid which transudes through its coats, and flows into the cavity of the body. There the various organs, such as the muscles, the nerves, and many secreting ves¬ sels, absorb from that fluid nutriment, whatever molecules are best adapted to their purposes. Those who look upon the dorsal vessel as a true heart, which dispenses a circu¬ lating fluid to the remotest ramifications of the wdngs and tarsi, will place less confidence in this particular view. However, it is certain that the secreting vessels are cha¬ racterized by a structure entirely appropriate to the func¬ tions which we have just assigned them, their surface being obviously furnished with numerous pores or small absorbent mouths. SECT. V THE DIGESTIVE SYSTEM OF INSECTS. The digestive system in insects naturally forms the next subject of consideration. The earliest, most general, and perhaps the only indispensable function of animal life, is that of nutrition. But its materials are so different, and their modes of reception so various, that the exercise of this function by no means necessitates the existence of a mouth, a stomach, or an alimentary canal; for an increase of parts may be effected even through the medium of im¬ ponderable or elastic fluids, and by imperceptible and super¬ ficial pores.3 The digestive organs of insects are however in general rather complicated, and a great variety of parts are brought into action. The more external portions, or those of the mouth, have been already described. We shall therefore at present confine our observations to the different portions of the intestinal canal, and the biliary and salivary vessek. It is natural to suppose that, in a class so extensive and varied as that with which we are now engaged, a correspond¬ ing diversity must exist in the form, development, and number of the parts which constitute the intestinal canal. It is always, however, so far tubular, and open at either end; but in some it is straight and of the length of the body; in others it is bent and longer than the body ; wdiile in many it is tortuous, or twisted on itself in numerous con¬ volutions, and consequently of great extent. In general, its length corresponds in a certain measure with the nature 1 Entomological Magazine, p. 244. . 2 Magazine of Natural History, vol. hi. p. 46. See also the German memoir by Dr Carus on the circulation or the larvse of neu- ronterous insects (Leipsig, 1827). The English reader may consult Mr Gore’s translation of Carus’s Introduction to Comparative Ana¬ tomy, appendix to vol. ii. p. 392. 1 Vol. hi* °f fh!® work, p. 183. E N T O M Internal of the aliments; such insects as feed on vearetable matters having a longer, and such as feed on animal substances a shorter canal. In some it is of equal diameter throughout; in others the breadth of special portions varies ; and there are many dilatations and restrictions, known by various names. It even differs greatly in the same species, accord¬ ing as the individual exists in the larva or imago state. The texture of the intestinal canal in insects is not the same in all parts of its extent; but on a careful examina¬ tion it is found to exhibit throughout three tunics, more or less distinctly marked. Of these, the first is external, with a membranous aspect; the second is of course intermediate and muscular, with its fibres diversely directed; the third is internal and mucous. In its more complicated state it exhibits the following parts : Lsf, a, pharynx ; 2d, an oeso¬ phagus ; 3d, a crop; kth, a gizzard; bth, a chylific ventri¬ cle ; 3th, intestines, which may be considered in subdivi¬ sion as the small intestines, the great intestine or caecum, and the rectum. The following may be regarded as the \isual process of transmission. The mouth, having seized and chewed the food, transmits it to the pharynx, into which salivary vessels sometimes open. It then passes into the (esophagus (of which the muscular nature occasionally produces by its action a peculiar impression), and is next transmitted to the crop, which converts it into a homoge¬ neous pulp. This is introduced into the gizzard, of which the sides, being armed with teeth, complete its trituration. In the form of a kind of paste it is now received by the chylific ventricle, where it undergoes the action of the bile, is converted into chyle, and thus supplies the nutritive fluid, which, passing through the coats of the ventricle, spreads over the splanchnic cavity, and pervades the whole of the organs. The residue is received by the small intes¬ tine, then by the great intestine, in which it remains for some time, and finally by the rectum. The pharynx, which is sometimes rather difficult to dis¬ tinguish as a distinct feature, is placed at the bottom of the mouth, and may be regarded as an anterior dilatation of the oesophagus. Two pieces, very apparent in certain Hymenoptera, called the epipharynx and the hypopharynx, seem to restrict and protect its entrance. The oesophagus is a conduit varying in length, which traverses the prothorax, and sometimes extends beyond it; but it is occasionally so short as scarcely to pass beyond the region of the head. Its structure is musculo-membra- nous, and it opens into the crop, or, if that part is wanting, into the gizzard, or, if the latter is also absent, into the chylific ventricle. It is around the origin of the oesopha¬ gus that the nervous system, as formerly described, con¬ stitutes a ring, by sending forth two branches