Mites Injurious to Domestic Animals. 67 



Eivolta), whicli have the skin only weakly chitinized, live on the 

 surface of the skin of the domestic fowl. In some cases of squamous 



Fig. 55. 



Dermanyssus gallinae (p. 87).— Dorsal view of female, X lOi. 

 (Original.) 



skin diseases (Pityriasis) they have been found in great numbers and 

 lave been accused of causing the trouble. 



