2l6 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3 d Ser. 



posterior ones, one above on tibia III. The epigynum shows a cavity longer 

 than broad, anterior part almost wholly occupied by the broad septum, which 

 is narrowed near the middle and with several fine teeth at tip. 



One female ; Mt. Orizaba. 



36. Drassodes perditus, sp. no v. 



Plate XIII, Fig. 7. 



Length S 10 mm., $ 12 mm. Cephalothorax reddish brown, clothed 

 with white pubesence; legs yellow, tips darker; sternum reddish; mandibles 

 dark red-brown; abdomen gray, with a basal horny spot, reaching one-third 

 of way to tip on dorsum, mostly clothed with black hair. Posterior eye-row 

 slightly procurved, longer than the anterior row; P. M. E. round, nearly their 

 diameter apart, plainly farther from the equal P. S. E.; the anterior row 

 straight; A. M. E. larger, about one-half their diameter apart, much closer to 

 the A. S. E. ; lateral eyes separated by more than their diameter; sternum 

 broad, sides rounded. Legs moderately long, three pairs of spines under 

 anterior tibiae, one pair under base of anterior metatarsi; posterior pairs 

 spined on all sides; scopulas on anterior legs to the bases of metatarsi. Ab- 

 domen rather depressed, about twice as long as broad. Tibia of male palpus 

 about as long as broad, with a bifid projection on the outer tip, the inner 

 branch short and stout, the outer longer and sickle-shaped; tarsus short, the 

 bulb very large and long, quite simple, with a small pale portion at tip. The 

 female is much like the male, but rather darker, and under tibiae I one spine 

 at base, one at middle, and a pair at tip. Epigynum shows a simple triangu- 

 lar cavity, longer than broad, and deepest behind; two dark, curved marks 

 in front. 



Two males from Agua Caliente and a female from Mex- 

 ico City. 



37. Leptodrassus (?) incertus, sp. nov. 



Plate XIII, Fig. 10. 



Length 7 mm. Cephalothorax red-brown in front, fading to pale yellowish 

 behind; mandibles dark red-brown; sternum reddish; legs yellowish; abdo- 

 men uniform light gray. Cephalothorax once and a third as long as broad, 

 broad in front; posterior eye-row nearly straight; P. M. E. round, nearly 

 twice their diameter apart, about as far from the slightly larger P. S. E. ; an- 

 terior row recurved; A. M. E. large, less than their diameter apart, closer to 

 the smaller A. S. E. which almost touch the P. S. E.; mandibles very large, 

 porrect, convex, granulate above, three teeth in front of fang, five small ones 

 behind; maxillae show no transverse furrow, but rather convex; lip nearly 

 square; sternum one-fourth longer than broad, nearly as broad in front as in 

 the middle. Legs rather slender, no spines above on the tibiae, five pairs 

 below on tibia I, three pairs on tibia IV, two pairs under metatarsus I, three 

 pairs under metatarsus IV; at tip of metatarsus IV is a bunch of black hair; 



