Acarina 



261 



150. Stigmal plate of Dermacentor andersoni; (a) of male, (b) of female. After Stiles. 

 (c) Dermacentor variabilis, male- (d) Glyciphagus obesus; (e) Otodectes 

 cynotis; (/) Tyroglyphus lintneri; (g) Tarsonemus pallidus; (h) anal plate 

 and mand'ble of Liponyssus; (c) to (h) after Banks. 



