. Bulletin of the Department of Agriculture. Agriculture; Agriculture. â Syrphus ribesii, an enemy of the rose aphis: a, Fly; 6, lateral view of head; c, larva or active immature form; d, anal spiracles; e, thoracic spiracle of same. All much enlarged. (From Chittenden.). Fig. A.âEupeodes volucris, an enemy of the rose aphis: a, Female fly; b, abdomen of male fly; c, hypopy- gium of male fly. Much enlarged. (From Webster and Phillips.) The rearing of five different species of syrphus flies from larvae found feeding on the rose aphis rather surprised the writer, and he regrets that lack of
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. â Syrphus ribesii, an enemy of the rose aphis: a, Fly; 6, lateral view of head; c, larva or active immature form; d, anal spiracles; e, thoracic spiracle of same. All much enlarged. (From Chittenden.). Fig. A.âEupeodes volucris, an enemy of the rose aphis: a, Female fly; b, abdomen of male fly; c, hypopy- gium of male fly. Much enlarged. (From Webster and Phillips.) The rearing of five different species of syrphus flies from larvae found feeding on the rose aphis rather surprised the writer, and he regrets that lack of time has prevented a continuation of the work. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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