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



39 



Coxae. Coxae contiguous and progressively reduced in sizes posteriorly. 

 Hood, Camerostome, and Cheeks. — Absent. 



Capitulum. — Basis capituli contracted in front and behind, approaching a 

 sphere in shape; surface irregular and with faint transverse rugae; a group of 

 short spines on the sides, visible in ventral view. 



Palpi. — Long, moderately heavy, article 2 much longer than article 1; 

 article 1 in contact with the base of the hypostome; articles 2, 3 and 4 free. 

 Length of article 4, three times its diameter. 



Hypostome. — Short and large, rounded apically; denticles arranged ' | 

 but it is not easy to distinguish the longitudinal files. Denticles a little larger 

 in the lateral files. Length, 0.6. 



Folds. — Supracoxal folds connected in front of the capitulum and termi- 

 nating posteriorly at preanal groove. Coxal fold extending from coxa II to 

 the preanal fold. 



Grooves. — Dorso ventral groove present and visible from above as a notch 

 at the side. Preanal groove pronounced. Transverse postanal and median post- 

 anal grooves faint or absent. 



Sexual opening. — At the level of the posterior ends of coxae I. 



Eyes. — Two pairs of eyes present, all of about equal size. 



Anus. — Small, in an elliptical pattern. 



O. savignyi is readily distinguished from moubata, another African species, 

 by the absence of eyes in the latter. 



HOSTS AND DISTRIBUTION 



This species is found in human habitations and is said to occur in loose, 

 dry soil in places frequented by animals or used as resting places for caravans. 

 It occurs in Africa, Arabia, India, and Ceylon. 



Fig. 13. Ornilhodoros savignpi (Audouin). A, Hypostome of adult. B, Leg I of 

 adult. C, Leg IV of adult. 



