ITCH MITES, 



zn 



CASE Symbiotes BOVIS {Gerlach), (Sarcoptes bovis, Hering ; Chorioptes caprse, 

 GeJ'vais ; Symbiotes equi, Gerl. ; Sarcodermatodectes capreoe, DelaJ. 

 and Boicr. ; Dermatophagus bovis, Ftirst.), — 10. Magnified sketcli of 

 male, under side. 



The characters of this genus do not differ greatly from those of 

 Sarcoptes. It has only one pair of chelate mandibles, and other 

 differences will be seen in the accompanying woodcuts, which 

 show the figure of the mite and of its suckers or ambulacra, 

 which also furnish a good generic character j in the female the 



Symbiotes bovis. Copied from Fursteiiberg's 



figure. 



Symbiotes bovis, anterior leg- and 

 suclcer. Copied from Furstenberg. 



two posterior pairs of legs terminate each in two long bristles. 

 The suckers are remarkable for their great development in this 

 species. In many other species of mite (as in the Hydrachnidae 

 and Hypopi, for example) they are more numerous, but here they 

 are larger. There is a large pair at the posterior part of the 

 male, and like those of the feet they are bowl- and cup-shaped. 

 It really seems as if Nature in making these creatures, had her 

 head so full of sucking apparatus that she scattered them about 

 in various places out of pure prodigality, and for all sorts of uses 

 — for walking, for sitting still, for holding on, and for adhering to 

 one another. 



