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



53 



of the camerostome. Hairs absent in the median area between the coxal folds, 

 few in number in the postero-Iateral surfaces but more numerous and larger 

 on the antero-lateral surfaces. 



Discs. — Reticulated dorsal surface interrupted by depressed areas which 

 include the discs. Discs large, distinct and their floors made irregular by 

 elevations similar to the mammillae. Discs visible in the median postanal 

 groove. 



Legs. — Moderate in length and size and with a few inconspicuous hairs. 

 Femora a little flared distally. Subapical dorsal protuberance prominent on 

 all tarsi. Two dorsal humps on tarsus I; a milder one near the articulation 

 with the metatarsus on legs II, III, and IV. With two or three mild dorsal 

 humps on metatarsi I and II. Length of tarsus I, 0.72; metatarsus, 0.54. 

 Length of tarsus IV, 1.02; metatarsus, 0.84. 



Coxae. — Coxae I and II well separated; all others contiguous. 



Hood. — No obvious hood present but in its place is a mild elevation in 



Fig. 21. Ornithodoros coo/epi Mclvor. Anterior portion of female, ventral view. 



