. A manual of veterinary hygiene. Veterinary hygiene. PAEASITES 429 for the purpose of leather. Miss Ormerod calculated the loss in Great Britain and Ireland was not less than two millions a year. It has been suggested it should be made a scheduled disease, and all owners of warbled cattle com- pelled to dress them during the spring, at a time when the disease is practically under control, for it is obvious if the larvse are then killed no fly develops. For this purpose the following should be used every few days to the holes in the back, viz., a mixture of Sulphur, Creosote, and Train Oil. Th
. A manual of veterinary hygiene. Veterinary hygiene. PAEASITES 429 for the purpose of leather. Miss Ormerod calculated the loss in Great Britain and Ireland was not less than two millions a year. It has been suggested it should be made a scheduled disease, and all owners of warbled cattle com- pelled to dress them during the spring, at a time when the disease is practically under control, for it is obvious if the larvse are then killed no fly develops. For this purpose the following should be used every few days to the holes in the back, viz., a mixture of Sulphur, Creosote, and Train Oil. This placed on the openings into the tracheae suffocates the larvffi ;* the same results from the application of mercurial ointment. It is better, how- ever, to squeeze out the larvse in the spring and kill them. As a preventive measure cattle before being turned out to grass should be dressed along the back and shoulder blades with Stockholm tar, I or butter and tar mixed with sulphur. Sheds give protection against fly attacks, and it is said the flies will not cross water. This is a common characteristic with some of the most formidable fly pests, for example Tse-tse. ^is- W2--^gf oi GastrovUhis '' ^ _ . eqiii attached to hairs oi horse Gastrophilus equi or Horse Bot and showing larva just hatched Fly is about half to two-thirds of (°^%™fl«d). an inch long, with reddish hairs on a dark banded thorax, and yellowish brown hairs on the abdomen. The eggs are deposited on the hair (Fig. 182), principally in the region of the fore-limbs, and are about yV inch long. When the egg is hatched, the larvse pushing off the lid, and their wriggling causing irritation, the horse rubs by the lips or licks the place, and so the larvae are conveyed to the mouth. In the stomach the larvse attain their full size, about I inch. They are provided with two hooks around the mouth, by which they anchor themselves to the wall of * Eeoommended by Mr. Thomson, , Aspatria. t lUd. Digitized by
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