Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] FLIES, MOSQUITOES, AND MIDGES 237 long, with four black stripes on the thorax. It is one of the most serious pests of cattle in the South and West, laying its eggs in wounds or sores in which the maggots develop, causing very serious festering sores. Sometimes it oviposits in human nostrils, the work of the larvae not infrequently resulting fatally. el FlG. 376. The screw-worm fly (Lncilia uiaccllaria] a, l>, c, larva and details of same ; d, pupa ; c, adult; /, head from side. (After J. B. Smith)
Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] FLIES, MOSQUITOES, AND MIDGES 237 long, with four black stripes on the thorax. It is one of the most serious pests of cattle in the South and West, laying its eggs in wounds or sores in which the maggots develop, causing very serious festering sores. Sometimes it oviposits in human nostrils, the work of the larvae not infrequently resulting fatally. el FlG. 376. The screw-worm fly (Lncilia uiaccllaria] a, l>, c, larva and details of same ; d, pupa ; c, adult; /, head from side. (After J. B. Smith) The tachina-flies (Tachinidae) are found frequenting floxvers ; they somewhat resemble the last group, but are commonly recognized by the numerous stout bristles and hairs with which they are clothed. The adults are mostly of a modest gray color, with thorax streaked with blackish-brown or gray, though some have yellow-banded or red abdomens. The eggs are laid on the bodies of caterpillars or on foliage on which they are feeding, and the maggots are parasitic within them. Any one who has tried rearing moths from their caterpillars will have encountered these flies; for often a score or more will inhabit a large caterpillar. When full grown the puparia are formed within the caterpillar or pupa, which never transforms. Some European species which are parasitic on the gypsy moth have been imported into Massachusetts with the hope that they may aid in controlling that pest in this country.
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