id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-022883-chrxyrls	Owen, Jennifer	Trophic variety and abundance of hoverflies (Diptera, Syrphidae) in an English suburban garden	2006-06-30		.txt	text/plain	3914	173	57	The trophic composition of the Malaise trap catch varied to some extent from year to year, as shown in Tab, 3, Although hoverflies with aphid-feeding larvae (group 2) constituted the majority of the sample in every year, their relative frequency was considerably lower in 1973 , 1976 . This is not reflected in the relative frequency of group 2 hovertlics in these years (see Tab. 3), largely because the numbers of resident species of Melanostoma and Platycheirus in the catch were far lower than usual; Melanostoma mellinum, for instance, whieh breeds in the garden and is usually common, was represented by only two individuals in 1977, and M. when Eristalis arbustorum and other species with larvae that feed on decaying organic material became particularly abundant in August such that, by September, the relative frequency of aphid-feeders had fallen io38.87o.	./cache/cord-022883-chrxyrls.txt	./txt/cord-022883-chrxyrls.txt