0. coriaceus 57 



round-toothed. The whole surface, above and below, dirty yellowish 

 earthy colour, rusty red spots irregularly distributed throughout. 

 Capitulum and palps light yellow. Legs grey-brown. Female. 

 Male : unknown. Habitat : Mexico." (Translation from the original.) 



Berlese (1888) states that he saw a specimen found by A. Balzan at 

 Rio Apa, Paraguay. We have recently determined specimens received 

 both from California and Mexico. Those from California 1 were collected 

 by Mr H. A. Moran at Los Olivos in August, 1904, and comprised 

 7 c/ 1 ,/ and 9 ? ? (Stanford University Coll.); the largest $ measured 

 138 x 8'2, the smallest 9'5 x 53 mm. ; the largest </ measured 8'6x46, 

 the smallest 6'4 x 3'4 mm. Those from Mexico were collected by Mrs 

 Zelia Nuttall in January, 1908, the lot including 1 £, 2??, and 

 3 nymphs (resembling the £). Both females were received alive and 

 the better specimen was drawn, as also the <f (Figs. 81-84). In respect 

 of colouration, the female agreed very closely with Koch's figure, the 

 other specimens are all dull brown like the soil in which they were 

 found. As noted above, the males are smaller than the females and are 

 similar in structure but for the sexual aperture (see Figs. 82, 84). The 

 nymphs were as small or smaller than the males and showed no trace of 

 sexual " Anlage." The ticks are called " talajas " by the natives, and 

 were found whilst exploring some rock inscriptions near San Geronimo, 

 on a hill in a sandy plain (Isthmus of Tehuantepec). Our description is 

 based on our Mexican specimens. 



See further under Section II on feeding habits and effects of bite. 



ORNITHODOROS TURICATA (A. Dug£s), 1876. 



Figs. 58, 85-87. 



Synonymy : Argas turicata A. Duges, 1876. 

 Ornithodoros americanus G. Marx, 1895. 

 Native name: "turicata" in Mexico (Duges, 1876). 



Lit. and Icon.: Duges, 1876.— Megnin, 1885, p. 463, PI. XX, Figs. 1-4— Marx, 1895, 

 posthumously published plate, appeared in Osborn, 1896, PI. Ill, Figs. 2, 8t; 

 good figures of <J dorsum, venter, etc. — Neumann, 1896, p. 31, Fig. 33, digit*. — 

 Ward, x. 1900 a and b. O.— Braun, 1906, p. 373. O.— Banks, 1908, p. 18, 

 PI. I, Figs. 13-16, integument, palp, legs 1 and 4. 



Adult (Figs. 85, 86) : Body with sides almost straight and parallel, 

 the anterior extremity narrowed to a round point, the distal portions of 



1 Banks, 1908, p. 19, has seen specimens from San Francisco and from Santa Clara 

 County which had been taken from cattle and cattlemen. 



