. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. Westwood. This little fly, not bigger than the common house fly, is the great obstacle to the exploration of Central Africa. "It is not danger- ous to man, to any wild animals, nor to the pig, the mule, the ass or the goat. But it stings mortally the ox, the horse, the sheep, and the dog, and renders the countries of Central Africa uninhabitable for these valuable ; The genus Tachina, of which Fig. 47 represents a species, is parasitic in caterpillars. Tachina doryphor
. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. Westwood. This little fly, not bigger than the common house fly, is the great obstacle to the exploration of Central Africa. "It is not danger- ous to man, to any wild animals, nor to the pig, the mule, the ass or the goat. But it stings mortally the ox, the horse, the sheep, and the dog, and renders the countries of Central Africa uninhabitable for these valuable ; The genus Tachina, of which Fig. 47 represents a species, is parasitic in caterpillars. Tachina doryphorce, Riley, feeds on the larvae of the potato beetle. The Red-tailed Tachina Fly, Nemoraea leucanice, Kirkp., Fig. 48, is parasitic on the army worm moth, Leucania unipuncta, Haworth. The fly deposits her eggs upon the fore part of the body of the worm. Prof. Comstock says " That as many as eighteen eggs are laid on a single worm, but the usual num- ber is about five. These eggs are so ingeniously placed that the worm can by no possibility reach them with its jaws, or get rid of them in any other way. Mr. Howard says that he has searched for hours in a field infested with army worms without finding a single full- grown worm that did not carry one or more upon its ; In Fig. 32, just underneath the fly is shewn the forepart of an army worm exhibiting the placing of the parasitic eggs. Sarcophaga, the Flesh Fly, is one of the viviparous species alluded to before. Fig. 49 is an enlarged repre- sentation of Sarcophaga carnaria, Linn. The flesh fly and Fig. 50 shows the maggot. The female is exceedingly pro- lific. The entomologist, DeGeer, vouching for the development of 20,000 larvae in one female. These flies sometimes deposit their larvae on living animals, and thus become parasites. Prof. Comstock says tha t "specimens of a flesh fly were reared from pupa of the Cotton worm, Aletia Argillacea, Hubner. These proved to be specimens of Sarcophaga Sarracenios, Ril
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
