38 American Midland Naturalist Monograph No. 1 



Smaller species, and proportionately narrower concanensis (p. 88) 



1 1 . Discs large and noticeable 12 



Discs small and inconspicuous rudis (p. 101) 



12. Legs with the surfaces micromammillated talaje (p. 82) 



Legs with the surfaces without micromammillae amblus (p. 99) 



1 3. Dorso-ventral grooves present, capitulum subapical 14 



Dorso-ventral grooves absent, capitulum distant from the anterior margin 



cooleyi (p. 52) 



14. Dorsal humps on tarsi I present 15 



Dorsal humps on tarsi I absent hermsi (p. 46) 



1 5. Eyes absent 1 6 



Eyes present conaceus (p. 42) 



16. Subapical dorsal protuberance on leg IV absent 17 



Subapical dorsal protuberance on leg IV present nicollei (p. 50) 



17. Dorsal humps absent on tarsus IV 18 



Dorsal humps present on tarsus IV eremicus (p. 40) 



18. Mammillae large, relatively few in number, not crowded turicala (p. 56) 



Mammillae small, many, and somewhat crowded parpen (p. 62) 



Ornithodoros savignyi (Audouin), 1826 



Plate 4, Fig. 13 

 1826. Argas savignvi Audouin, p. 183, original description. (See Oudemans Part III, 



B, P . 789, 1936.) 



1844. Ornithodoros savignyi (Audouin) : Koch, p. 219. 



1873. (?) Ornithodoros morbillosus Gerstaecker, p. 464: Nuttall et al. (1908, p. 42). 



1889. Argas schinzii Berlese, p. 289. 



1896. Ornithodoros savignyi (Audouin): Neumann, p. 26. 



1908. Ornithodoros savignyi (Audouin) : Nuttall ei al., p. 42. 



1911. Ornithodorus savignyi (Audouin): Neumann, p. 123. 



1932. Argas savignyi Audouin: Bedford, p. 282. 



1934. Argas savignyi Audouin: Bedford, p. 86. 



1936. Ornithodorus savignyi (Audouin): Brumpt, pp. 1196-1197. 

 Sexes similar; adults and nymphs similar. 



ADULT 



Body. — Short, oval, broader behind, rounded on both ends. Size 10.0 x 7.5 

 to 13.0 x 9.0. 



Mammillae. — Numerous, moderate in size, and of about equal size on all 

 parts of the tick. Individual mammillae, convex on top (some on the venter 

 are nearly flat on top) and with irregular, radiating ridges on their bases. 

 Under higher magnification some mammillae show faint, small pits on the 

 convex surface. Hairs smooth, tapering, arising from smallet mammillae; fewer 

 on the dorsum, more abundant on the venter and most abundant and longer 

 on the anterior and above the mouth parts. 



Discs. — Distinct, small and placed in depressions; in a nearly symmetrical 

 pattern but more numerous than in many species of the genus. 



Legs. — Short, moderately large; surface smooth (not granulated) . Hairs 

 on the legs few in number, longer on the dorsal surface of the articles and on 

 anterior legs. All femora distinctly larger distally than proximally. All tarsi 

 with the subapical dorsal protuberances pronounced and with 2 pronounced 

 dorsal humps. Metatarsi I, II, and III with 3 pronounced dorsal humps; IV 

 with 2. Length of tarsus I, 1.2; metatarsus, 0.96. Length of tarsus IV, 2.04; 

 metatarsus 1.725. 



