56 American Midland Naturalist Monograph No. 1 



Ornithodoros turicata (Duges), 1876 

 Figs. 23, 24, 27. 28, 29, 30, 31. 33 and 34 



1876. Argas turicala Duges, original description in "Repertorio de Guanajuato," 

 April 25. 



1884. Argas turicata Duges: Duges, redescnbed pp. 195-197, with figures. 



1885. Argas turicata Alf. Duges: Megnin, redescribed, pp. 463-470, with figures. 



1895. Ornithodoros americanus G. Marx, figures only, p. 199, Marx obituary notice. 



1896. Ornithodoros turicata (Alf. Duges): Neumann, redescribed, pp. 31-34. 

 1908. Ornithodoros turicata (Duges) : Banks, redescribed, p. 18, with figures. 



1908. Ornithodoros turicala (A. Duges) : Nuttall, Warburton, Cooper and Robinson, 



redescribed, pp. 57-59, with figures. 

 1911. Ornithodoros turnicata (Alf. Duges): Neumann, redescribed, p. 124. 

 1930. Ornithodoros turicata (Duges): Hoffman, redescribed, pp. 155-160, with figures. 

 1936. Ornithodorus turicata (A. Duges): Brumpt, pp. 1201-1203. 



Sexes similar; nymphs and adults similar. 



ADULT 

 Body. — Oval, slightly wider behind, anterior and posterior ends evenly 

 rounded, hood visible from above. Size of female from 9.90 x 6.80 to 6.20 x 

 4.6. Size of male from 6.3 x 4.0 to 5.4 x 3.30. Nuttall et al. (1908) give as 

 average size of females 6x4, and of male, 3.5 x 2.5. Thus, there is evident 

 an unusual range of sizes in the species. 



Mammillae. — Moderately numerous and larger than in parken, distinctly 

 larger at the posterior margin and smallest in the mid-ventral area. The indi- 

 vidual mammillae are raised abruptly from the surface, nearly hemispherical 

 on top with small pits in the convexity and with radiating striae at the bases. 

 Mammillae less crowded than in parkcri, and more elevated, with the radiat- 

 ing ridges at the bases more distinct. Interspersed with the usual mammillae 

 are smaller conical, truncate elevations, each with a hair arising from a central 

 papilla. Similar but larger hairs occur on the anterior body wall above the 

 camerostome. 



Discs. — Distinct, and depressed. Absent on the ventral surface except in 

 the grooves where they are in lineal arrangement. 



Legs. — Moderate in length and size, a little larger than in parker'h with 

 articles mildly flared distally. Surface smooth and shining (without micro- 

 mammillae or granulations). Hairs on legs small, short. Tarsi I, II, and III 

 with a mild su'bapical dorsal protuberance; absent on tarsus IV. Tarsus I with 

 three or four dorsal humps; metatarsus I with four or five; absent on tarsus 

 IV. Length of female tarsus I, 0.72; metatarsus, 0.60. Length of female tarsus 

 IV, 1.08; metatarsus, 1.08. Length of male tarsus I, 0.84; metatarsus, 0.66. 

 Length of male tarsus IV, 0.96; metatarsus, 1.05. 



Coxae. — Coxae prominent, progressively larger anteriorly. Coxae I and II 

 slightly separated; all others contiguous. 



Hood. — Large and prominent, not continuous with the dorsal body wall. 



Cheeks. — Absent. 



Capitulum. — Basis capituli about as wide as long; a little smaller than in 



