408 



ARACHNIDA 



ORDER 4. SOLPUGIDA.* (SOLIFUGAE.) 



Head region separated from the thorax and bearing very large 

 chelate mandibles, the leg-like pedipalps, and the first pair of legs, as well 

 as a pair of eyes; thorax consists of 3 distinct segments, each bearing a 

 pair of legs; abdomen 10-jointed; respiration by tracheae, the first pair 

 of spiracles being on the thorax, the other 3 pairs being on the abdomen; 

 genital pore in first abdominal segment : usually nocturnal animals which 

 live in sandy deserts in the warmer parts of the earth; 3 families with 

 about 165 species, a few of which are found in this country, chiefly in 

 the southwest; they are much feared, although not poisonous. 



FAMILY SOLPUGIDAE. 



Second and third pair of abdominal spiracles not covered with 

 denticulate plates: 21 genera and about 145 species. 



EREMOBATES Banks (Datames Simon). 

 Anterior margin of head truncate; fourth 

 pair of legs without a terminal claw; dorsal 

 finger of mandible without teeth or spur: 

 about 18 species, all in America. 



E. pallipes (Say). The movable seg- 

 ment of the mandibles in the male with 1 

 large and sometimes 1 very small tooth; 

 the inner side of the pedipalp of male 

 hairy and without bristles; length 13 mm.; 

 color light yellow: southern states west 

 of Mississippi, north into Kansas and 



Fig. 64 



Eremobatcs Jormi- 

 (Kingsley). 



E. formidabilis (Simon) (Fig. 644). 

 Movable segment of the mandible slender and with 1 large and 2 small 

 teeth: California and Arizona. 



ORDER 5. PSEUDOSCORPIONIDA.f 



Small arachnids with an 11-jointed abdomen, with chelate mandibles, 

 the movable finger of which bears along its inner margin the comb- 



* See "The Solpugidae of America," by J. D. Putnam, Proc. Davenport Acad. 

 Nat. Sci., Vol. 3, p. 1, 1882. "Synopsis of the North American Solpugida," by N. 

 Banks, Am. Nat., Vol. 34, p. 426, 1900. "Palpigradi und Solifugae," by K. Kraepelin. 

 Das Tierreich, 1901. 



t See "Notes on North American Chernetidae," by N. Banks, Cand. Entom., Vol. 

 23, 1893. "Notes on the Pseudoscorpionidae," by N. Banks, Jour. N. Y. Entom.' Soc., 

 Vol. 3, 1895. "Habits and Distributions of the Pseudoscorpionidae, principally 

 Chelanops oblongus, Say," by E. W. Berger, Ohio Nat., Vol. 6, p. 407, 1905. "A List 

 of the North American Pseudoscorpionida," by K. R. Coolidge, Psyche, Vol. 15, p. 

 108, 1908. 



