52 



American Midland Naturalist Monograph No. 1 



Ornithodoros cooleyi Mclvor, 1941 



Plate 6. Figs. 20, 21. and 22 

 1941. Ornithodoros cooleyi Mclvor, original description, with figures, pp. 435-436. 

 Whether the sexes and adults and nymphs are similar or dissimilar is 



lkn 



unknown. 



FEMALE 



Body. — Sub-oval, sides nearly parallel, anterior end bluntly pointed, pos- 

 terior end broadly rounded. Length, 9.25; width, 4.5. 



Mammillae. — Integument of the dorsal and the median posterior ventral 

 surfaces in a reticulated pattern made up of numerous deep pits surrounded 

 by continuous ridges of crowded mammillae of irregular shape. Surface of 

 the floors of the pits irregular and each pit with a hair on an elevation placed 

 on the anterior side of the pit. Reticulated surfaces continuous over the sides of 

 the body with pits more shallow on the posterior ventral surface and indistinct 

 or absent on the supracoxai folds, the inter-coxal area and in the vicinity of the 

 mouth parts. Surface wrinkled posterior to the capitulum and at the sides 



Fig. 20. Ornithodoros cooleyi Mclvor. A, Capitulum of nymph, ventral view. B, Leg 

 I of adult. C, Leg IV of adult. D, Leg I of last stage nymph. E, Leg IV of last stage 

 nymph. 



