74 



Mites Injurious to Domestic Animals. 



The fur of the rabbit and hare is the normal habitat of this 

 species. It is said to feed on the minute pilicolous Acari (Listro- 

 phorus, etc.) found on these rodents. In 1917 specimens of this 

 mite were found by the author on a domestic cat in London. 

 Cheyletiella parasitivorax has also been observed more recently on 

 cats in Denmark by Lomholt and others. 



Several other species of Cheyletiella are found upon birds. 



FIG. 62. 



Dermanyssus muris (p. 87), x 40. A widely distributed parasite of rats. 



(a) Ventral aspect, (b) Dorsal aspect. 



(After Hirst, Bull. Ent. Res. 1914.) 



Genus Syringophilus, Heller, 1880. 



Body very elongated and furnished with a number of long hairs. 

 Chelicerae stiliform. Palpus and first leg normal, not being modified 

 to form clasping organs. Feet with two claws and also with two 

 combs, each composed of a series of setae. 



Syringophilus bipectinatus, Heller, 1880. 



(Figs. 41 a and 42 a.) 



Body very elongated, the female being almost vermiform, in 

 but the male somewhat shorter and stouter. 



