2 6 Mites Injurious to Domestic Animals. 



sides, and inner surface of tlie tliighs may also be invaded ; some- 

 times the infection is general, the whole body being affected. 

 Pruritus is intense even in the early stages. The hair falls out, and 

 the skin becomes coated with dried crusts formed by the morbid 

 secretions. Sometimes the papillae of the skin become increased 



Fig. 8. 

 Sarcoptes scabiei, var. equi, 9 . — Dorsal view, X 209. (Original.) 



in size, forming wart-like eminences. In advanced cases the skin 

 is very much thickened, wrinkled, and covered in places with thick 

 crusts in which the specimens of Sarcoptes may be present in large 

 numbers. This kind of mange is said to be more common in 

 pigs in the United States than the mange due to Demodex. 



