lOO Veterinary Medicine. 



with more or less scurffy debris, nits and exuvia. I<ow condi- 

 tion if not present as a cause usually follows invasion by lice. 

 In the Angora the fleece is greatly depreciated. 



Symptoms in Pig. Harboring the largest known hsemato- 

 pinus, the pig suffers greatly from its attacks. It rubs violently 

 on wall, trough or posts, bites and scratches, when free seeks to 

 plunge in water or liquid manure, and the skin shows excoria- 

 tions and erosions of all degrees of severity. The hsematopini 

 are found at the roots of the ears, inside the legs, along the belly 

 and elsewhere with heads turned in toward the skin and the 

 sucking tube imbedded in it. As in other animals the parasites 

 are likely to prevail in neglected herds, where neither feeding 

 nor cleanliness are duly attended to, and when very abundant 

 they cause great emaciation, debility and even death. 



Symptoms in Dog. The hcematopinus piliferus is found 

 especially in long-haired dogs, and about the neck. It causes 

 much irritation, sleeplessness and scratching with the production 

 of depilation, excoriation, .scurf and scab, in the midst of which 

 the parasite may be detected. The trichodectes is often pre.sent 

 in weak subjects (the very young or the very old), and is much 

 less injurious, though invading the entire skin. 



Symptoms in Cat. The trichodectes subrostratus may invade 

 the whole body, yet is not very injurious, unless when in very 

 large numbers in the young or old. The cat licks, bites and 

 scratches the parts as it would with fleas. By parting the fur the 

 parasites can be easily found. 



Symptoms in Birds. With the great variety of bird lice and 

 their different habits, the part of the body attacked and the re- 

 sulting irritation vary. The body, particularly under the wings, 

 form a favorite seat, though in other cases the neck and head are 

 invaded manifestly as being out of the way of the beak. Some, 

 like the decophora, migrate to the head after the death of the 

 host. The itching seems to be greatest during hot or cloudy 

 weather, the birds erecting the feathers, picking, .scratching, 

 flapping the wings, rolling and scratching in a dust bath, aban- 

 doning their nests, and rapidly lo.sing condition. The picking 

 out of feathers, the quills of which have been invaded by lice, 

 gives the appearance of unseasonable moulting. A variety of dif- 

 ferent species may be found on the same bird, accompanied by 



