40 



American Midland Naturalist Monograph No. 1 



Ornithodoros eremicus Cooley and Kohls, 1941 

 Plate 4, Figs. 14 and 16 

 1941(b). Ornithodoros eremicus Cooley and Kohls, original description, pp. 588-589. 



NYMPH 



Body. — (Described from an early stage nymph.) Short oval, approaching 

 circular, broadly rounded on both ends, tips of mouth parts visible from above. 

 Size, 1.44 x 1.11. 



Mammillae. — Numerous, small, and of about equal size in median and 

 peripheral areas on both dorsal and ventral surfaces. Individual mammillae 

 only a little elevated, flattened, with their surfaces smooth and shining. A few 

 short hairs present, those on the anterior margin and above the anterior legs 

 larger. 



Discs. — Little in evidence, small and slightly depressed; not evident on the 

 venter. 



Legs. — Moderate in length and size. Surface smooth. Hairs few in number. 

 Subapical dorsal protuberance present on tarsi I, II, and III, absent on 

 tarsus IV. Dorsal humps moderate; three on tarsus I, two on II, two on III, 

 none on IV. Metatarsi I, II, and III, each with three dorsal humps; metatar- 

 sus IV, with two. Length of tarsus I, 0.3; metatarsus, 0.18. Length of tarsus 

 IV, 0.42; metatarsus, 0.285. 



Coxae. — All coxae contiguous. 

 Hood, Camerostome, and Cheeks. — Absent. 



Hypostome. — Moderate in length, sides parallel, apex rounded. Denticles 

 arranged -/•> with two or three in each file and placed near the distal end. 



Fig. 14. Ornithodoros erimicus Cooley and Kohls. A, Hpostome of small nymph. 

 B, Tarsus and metatarsus of leg I of small nymph. C, Tarsus and metatarsus of leg IV 

 of small nymph. 



