Cooley 6c Kohls: Argasidae of N. America, etc. 



63 



median files about equal in size. Length of female hypostome, 0.40; male, 0.33. 

 Shorter than in turicata. 



Folds. — Coxal and supracoxal folds present. 



Grooves. — Dorso-ventral groove present and visible at the sides on the 

 dorsal surface of the tick. Preanal, transverse postanal and median postanal 

 grooves are present, pronounced. 



Sexual opening. — At the level of the intervals between coxae I and II. 



r-\ 



Fig. 25. Ornithodoros parfycri Cooley. A, Leg I of female. B, Leg IV of female. 

 C, Hypostome of female. D, Hypostome of male. L, Capitulum of larva, ventral view. 

 F, Larva, dorsal view. 



