Cooley & Kohls: Argasidae of N. America, etc. 101 



Ornithodoros rudis Karsch, 1880 

 Plate 10, Fig. 46 



1880. Ornithodoros rudis Karsch, original description, p. 141. 

 1901. Ornithodoros talaje (Guerin-Meneville) : Neumann, p. 259. 



1921. Ornilhodorus venezueliensis [sic] Brumpt, in Neveu-Lemaire. p. 348. 



1922. Ornilhodorus venezuelensis Brumpt: Brumpt, redescribed, pp. 773-775, with 

 figures. 



1928. Ornithodoros venezuelensis Brumpt: Ruge, redescribed, pp. 406-409, with figures. 

 1936. Ornithodoros venezuelensis Brumpt: Brumpt, redescribed, pp. 1203-1205, with 



figures. 

 1936. Ornilhodorus migonei Brumpt, pp. 1209-1210. 



Sexes similar; adults and nymphs similar. 



ADULT 



Body. — Long-ovate, sides nearly parallel, anterior end pointed. Size of 

 female, 5.5 x 3.0 to 3.95 x 2.0; male, 4.2 x 2.2 to 3.6 x 2.1. 



Mammillae. — Moderate in number, convex and shining on top and with 

 radiating striae on their bases; with one or more crescentic pits on the margin 

 of each. On both the dorsal and ventral surfaces, short fine hairs arise from 

 the crescentic pits at the sides of the mammillae, more abundant on the sides 

 and at the posterior end. Mammillae a little larger in the marginal areas and 

 largest of all at the posterior margin; smaller and less definite on the venter. 



Discs. — Superficial and faintly differentiated from the mammillae; in a 

 symmetrical pattern on the dorsum but on the venter visible only on the 

 median postanal groove. 



Legs. — Moderate in length and size, with numerous short hairs, those on 

 the tarsi in two ventral rows. Surface of the legs micromammillated. Subapical 

 dorsal protuberance small on tarsus I, very small or absent on tarsus IV; 

 dorsal humps absent. Length of male tarsus I, 0.585; metatarsus, 0.42. Length 

 of male tarsus IV, 0.54; metatarsus, 0.435. 



Coxae. — Short and small, I and II a little separated but others contiguous; 

 surfaces micromammillated. 



Hood. — Continuous with anterior extension of the dorsal body wall; apical- 

 ly bent ventrad and together with the cheeks affords some protection for the 

 mouth parts. 



Cheeks. — Reniform with the free edges irregular. 



Capitulum. — Basis a little wider than long; surface irregular, micromam- 

 millated, with faint transverse wrinkles and with short, fine hairs on each 

 side behind. Palpi micromammillated; article 1 with a narrow flange extend- 

 ing over the base of the hypostome. 



Hypostome. — Moderate in length, sides nearly parallel, apex notched. 



