Economic entomology for the farmer Economic entomology for the farmer and fruit-grower economicentomolo01smit Year: 1906 Horn-fly, Hcematobia serrata.—a, egg; 3, fly ; c and rf, head and tnouth parts; all enlarged. Fig. 417. the horns of cattle, although it is really just as abundant on the flanks, upon the udder, and in other places where it cannot be readily reached by the animals. The fly seems to confine its at- tacks to horned cattle, although it has been seen on mules in the State of New Jersey. Like the stable-fly, it is a blood-sucker, and both species are often found on animals at th
Economic entomology for the farmer Economic entomology for the farmer and fruit-grower economicentomolo01smit Year: 1906 Horn-fly, Hcematobia serrata.—a, egg; 3, fly ; c and rf, head and tnouth parts; all enlarged. Fig. 417. the horns of cattle, although it is really just as abundant on the flanks, upon the udder, and in other places where it cannot be readily reached by the animals. The fly seems to confine its at- tacks to horned cattle, although it has been seen on mules in the State of New Jersey. Like the stable-fly, it is a blood-sucker, and both species are often found on animals at the same time, keeping them in that state of constant irritation which prevents their proper feeding and digesting, and keeps them poor and in no condition to produce a free flow of milk. Not only in the fields or pastures are the cattle annoyed by these insects, but in the stable as well, so that the animals get no rest night or day. Eggs are laid in fresh cow-dung, and before this has an oppor- tunity to dry under ordinary conditions, the larvae are full-grown and ready to pupate. It is the immense number of these insects that makes them dreadful, and when the Egg of horn-fly. — i, unhatched, from side; 2, hatched, from front; 3, same, from side, to show lid-like structure; all enlarged.
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