. A text-book of agricultural zoology. Zoology, Economic. DIPTEKA OR TKUE FLIES. 203 The Ceuoifbr Midge (C. brassio^). Another member of the same family is often injurious to turnip and cabbage seed. The larvae of this midge live in the seeds of turnip, rape, and cabbage, in the pods. As many as sixty may often be found in one pod, which they cause to turn prematurely yellow and to burst. The fly h^ a black head and thorax, pinkish abdomen banded with dark-brown, and black legs which are silvery beneath. The female has a long white ovipositor, and lays her eggs in the young pods. We find the l
. A text-book of agricultural zoology. Zoology, Economic. DIPTEKA OR TKUE FLIES. 203 The Ceuoifbr Midge (C. brassio^). Another member of the same family is often injurious to turnip and cabbage seed. The larvae of this midge live in the seeds of turnip, rape, and cabbage, in the pods. As many as sixty may often be found in one pod, which they cause to turn prematurely yellow and to burst. The fly h^ a black head and thorax, pinkish abdomen banded with dark-brown, and black legs which are silvery beneath. The female has a long white ovipositor, and lays her eggs in the young pods. We find the larvae in May and June : they are white, often with a greenish- yellow stripe down the middle. They reach one-twelfth of an inch in length when mature, and fall to the ground out of the split pod and there pupate, coming forth as the second brood of flies a few days hence. I have found it has three broods at times. Little can be done to prevent its damage, which is often severe. Numerous other Cecids make their eifects felt, but space for- bids our even mentioning them here. The Bibionidse form a family of dark flies with broad bodies, short legs, and the tibiae armed with thick spines. They. 'tni Fig. 97,—Bibionida A, Adult Bihio marci: e, larva and pupa of B. pommuc. frequent damp meadows, and some of the genus Bibio appear in great numbers. One species, the Pevev Fly (Dilophus febrilis),. 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 Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899
