. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. FAMILY OESTRIDM 267 others like bees, and the rat-tailed species {EristaUs tenax) looks like a drone bee. Bot Flies {Oestridoe).—The bot flies are parasitic in various mammals, occupying the body tissues and primarily the ali- mentary tract. The adults are bee-like, with rounded heads and small eyes, and are hairy. The antenna? are sunken into little pockets or pits in the front of the head, and the mouth ])arts are aborted. The adults do not feed. The females are. Fig. 213
. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. FAMILY OESTRIDM 267 others like bees, and the rat-tailed species {EristaUs tenax) looks like a drone bee. Bot Flies {Oestridoe).—The bot flies are parasitic in various mammals, occupying the body tissues and primarily the ali- mentary tract. The adults are bee-like, with rounded heads and small eyes, and are hairy. The antenna? are sunken into little pockets or pits in the front of the head, and the mouth ])arts are aborted. The adults do not feed. The females are. Fig. 213.—Horse bot fly (Gastrophilus eqiii): a, egg, enlarged; b, nat- iiral size; c, larva, newly hatched, enlarged; d, more enlarged; e, oral hooks; /, body spines; g, mature larva, twice natural size; h, adult female. (Author's illustration. Bur. U. S. Dept. Ag.) the more commonly seen and they deposit their eggs on the ani- mals that are to serve as hosts for the larvae. The males gener- ally remain in shady places among grass, etc., so that they are much less likely to be observed. The larvae seem to have adjusted themselves to the parasitic condition from a more primitive condition, possibly that of living in organic matter of some kind. It seems most likely that some form with habits perhaps like the blow fly might in some cases deposit. 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 Osborn, Herbert, 1856-1954. Philadelphia, New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1916
