NO. 1382. THE ACAIiJXA OR MITES— BAXKS. 57 



11. Male genital opening in middle of sternal plate; !>(>dy rather short ami usually 

 with hairs or spines 12 



]\lale genital opening on anterior margin of sternal plate lo 



ll'. Peritreme rather short; dorsal shield divided; leg II of male unarmed /enrin 



Peritreme long; dorsal shield entire; leg II of male armed with teeth Seio'If.'^ 



13. Leg II of male unarmed; body usually egg-shaped; dorsal shield entire 14 



Leg II of male armed with teetli; 1)ody usually longer 1(> 



14. Male with ventral i^lates all united; anal plate separate in female; female genital 



plate not angulate in front Lnhip.^ 



Anal plate separate in lioth sexes 15 



15. Anal plate broad; epistoma scarcely pointed : Scius 



Anal plate small and narrowed behind; epistoma usually with a mucronate 



front Jf>/leiastes(^ 



1>'5. In female the sternal plate reaches behind hind coxie; the ventral and genital 



plates united, the anal separate , : J^icJnjInidp.^ 



in female the sternal plate .scarcely reaches hind coxie; the ventral plate often 

 united to anal, but not to genital 17 



1 7. Female genital plate triangular, angulate in front (janidsa.s 



Female genital plate rounded in front IS 



18. Dor.-al shield entire Ilijdnxjamiixux 



Dorsal shield more or less divided 19 



19. Anal plate united to ventral (jcunasellu.t 



Anal plate free Cijrtohclaps 



The genus Ra'dlletla is based on li. aurls^ which was found by Leid\' 

 in the ears of cattle in this countr3% Of Iphiopsis and Epicrim no 



Fig. 102.— Hvlet.\stes sp. and anal plate. 



Fig. 103.— Hyletastes ovai.ks (pergandei 



species have been found in this countiy; the latter often has a reg-ular 

 pattern of tubercles on its dorsum, A species of Cd^^nopmla has been 



^Gistl's genus (1848) to replace Iph\» Koch, antedates Emeus ^legnin. 



