Coolky & Kohls: Argasidae of N. America, etc. 



43 



coarse transverse wrinkles. Palpal article 1 with longitudinal wrinkles and with 

 a thin flange extending over the base of the hypostome. 



Hypostome. — With the sides nearly parallel. Denticles arranged -j-?, with 

 about four large ones in each file, all about equal in size. Length in the 

 female, 0.57; male, 0.45. 



Folds. — Coxal and supracoxal folds present. 



Grooves. — Dorso-ventral, preanal, transverse postanal, and median post- 

 anal grooves present; dorso-venrral groove visible in dorsal view as a marginal 

 dent. 



Sexual opening. — At the level of coxae I. 



Eyes. — Two pairs of ocellus-like eyes present, those of the anterior pair 

 much larger. 



Anus. — In an elliptical frame. 



Fig. 15. Ornilhodoros coriaceus Koch. A, Leg I of adult. B, Leg IV of adult. 

 C, Capitulum of larva, ventral view. D, Larva, dorsal view. E. Hypostome of adult. 



