Mites Injurious to Domestic Animals. 47 



Notoedrus cati, Hering, 1838. 



(Figs. 10, 11.) 



There are a number of scales grouped together in the middle 

 of the dorsal surface in this species, but they are not nearly so well 

 developed as in the species of Sarcoptes, only the posterior edge 

 being somewhat salient. 



Mange in Cats. Mange in cats generally starts on the neck, 



FIG. 29. 



Pterolichus sp., from interior of quills of feathers of North American 

 fowl. Cast skin of nymph, X 160. (Original.) 



afterwards appearing on the ears, forehead, and round the eyes; 

 finally nearly all the head is affected. Greyish crusts are present, 

 and in advanced cases the skin becomes hard, thickened, and 

 creased, almost like leather in appearance. In cats mange is usually 



