SCABIES. 



705 



like the latter, on the skin of other creatures besides the horse. 

 Its existence is short, if conveyed to the skin of man, or of an 

 ox, sheep, dog, &c., and the form of horse mange which it 

 induces is, therefore, essentially confined to the equine species ; 

 and that form of mange with which we are most conversant is 

 connected with the existence of this acarus. 





Fig. 129.— Dermatodectes eqni.— (Gerlach.) 



SYMBIOTES EQUI. 



" This parasite, like the dermatodectes equi, seems to live only 

 on the horse ; and it is readily obtained from beneath the scales, 

 2z 



