INJURING CATTLE. 263 



insect pushes through the skin of its host, and sucks 

 the blood. The eggs are glued to the hairs of the 

 cattle, and the young lice do not differ essentially in 

 appearance from the adults, except, of course, in size. 

 These insects generally infest the neck and shoulders 

 of cattle. 



The Long-nosed Ox-louse (Hsematopinus vituli) is 

 represented magnified at Fig. 137, b. As will be 

 seen, it differs materially in appearance from the 

 other species, being at once distinguished by its longer 

 and more slender body. It is about one-eighth of 

 an inch long, and obtains its food by suction. 



An idea of the form of the Biting Ox-louse (Trieh- 

 odectes scalar is) may be obtained from Fig. 137, c, 

 which represents a closely related insect infesting 

 horses. This species differs also in color from 

 the sucking cattle lice, being of a reddish hue. 

 Its eggs are glued to the hairs of the cattle. It is 

 very abundant in all parts 'of the world where do- 

 mestic cattle are found. 



Remedies. — The best method of destroying lice 

 on cattle and other domestic animals is to apply a 

 thoroughly prepared emulsion of kerosene and soap, 

 made as directed in the Introduction (page 20). If 

 this is well made it can be applied to cattle and 

 horses, hogs and sheep, with no danger of injury to 

 them, while it will destroy all the lice with which it 

 comes in contact. Professor C. P. Gillette, who first 

 gave this method a thorough trial, recommends ap- 

 plying it with a force pump and spray nozzle, rubbing 



