Zool— Vol. I.] BANKS-MEXICAN ARACHNIDA. 289 



PSEUDOSCORPIONID^. 



301. Chelanops, sp.? — One specimen probably new. It 

 has simple hairs and is related to C. oblongiis, but has pale 

 palpi. Hermosillo. 



302. Ideoroncus mexicanus, sp. nov. 



Length 2.4 mm. Cephalothorax once and one-half longer than broad, a 

 little broader behind than in front; one eye each side; mandibles of moderate 

 size, a hair-like stylet. Palpi quite long, trochanter swollen behind; femur 

 rather longer than cephalothorax, nearly cylindrical; tibia one-fourth shorter, 

 short pedicellate, but little swollen either side and no broader than femur; 

 hand evenly convex outside, very strongly so on inner margin, being at one 

 place twice as broad as femur; fingers slender, longer than hand, slightly 

 curved; body narrow, widest in the middle; segments undivided. 



One specimen; San Miguel de Horcasitas. Differs from 

 /. obscurns in smaller size, more slender tibia, and much 

 longer fingers. 



303. Chelifer scabrisculus Sim. — One example; Sonora. 



PEDIPALPI. 



304. Buthus carolinianus Beauv. — A few specimens 

 without locality, probably from eastern Mexico. 



305. Thelyphonus giganteus Latr. — A few from Mexico, 

 without farther locality. 



306. Admetus asperatipes Wood. — Many examples from 

 San Jose del Cabo and Sierra San Lazaro, March and Sept. 



307. Admetus corona tus Butler. — Two from Mazatlan, 

 Nov. 



SOLPUGIDA. 



308. Datames formidabilis Sim. — A number of speci- 

 mens of this large species from San Jose del Cabo and 

 Sierra San Lazaro, Sept. 



