482 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



ducecl obliqaely downward aud backward, thus forming one short band 

 and one somewhat curved or sinuated line on each side 5 then follows 

 on the back, three or four transversal angularly bent lines, gradually 

 diminishing in length. The sides of the abdomen, toward the belly, 

 show also a longitudinal row of three pale spots, or streaks, of which 

 the foremost is the largest. The region round the mamillse is pale yel- 

 lowish, as is also the belly, which shows a large, irregular, sooty patch 

 behind the vulva. The vulva is of a pale reddish-brown hue, the ma- 

 millce pale yellowish, darker at the extreme apes. 



Length of body 2§, of cephalothorax somewhat more than 1 millim. 

 Legs : I 5^, legs IE and IV 5 millim., patella + tibia iv 1^ millim. 



A single specimen, a female, was captured under a stone on Gray's 

 Peak (about 14,000 feet above the level of the sea), a little below the 

 summit, July 7, 1875. 



Gen. Eeigone Sav. et Aud., 1825-27. 



4. E. cacuminum n. 



Brown, with the palpi and legs brownish-yellow, darker at the ex- 

 tremity; abdomen olivaceous or brownish-gray; cephalothorax as long 

 as patella + tibia of the 4th pair, the pars cephalica large, slightly 

 sloping from the middle toward the eyes ; height of clypeus a little 

 greater than length of the area of the central eyes, this area being 

 nearly double as broad behind as in front, and a little shorter than 

 broad behind ; eyes small, the fore lateral ones little if at all larger than 

 the eyes of the hind row ; claw-furrow of the mandibles armed with a 

 row of 5 teeth ; vulva forming a transverse, elevated, . uneven area, 

 which is black at the ends and reddish-brown in the middle. — 9 ad^ 

 Length about 3^- millim. 



Female. — Cej)lialotJiorax as long as patella and tibia of the 4th pair 

 of legs, rather abruptly but slightly narrowed between the jialpi and 

 the coxjB of the 1st pair; the pars thoracica large, rather slightly 

 rounded in the sides, the pars cephalica shortish, broad with the an. 

 terior angles broadly rounded ; the breadth of the clypeus equals about 

 I of the greatest breadth of the pars thoracica. The cephalic furrows 

 are but slightly marked. On each side of the pars thoracica are three 

 shallow and short depressions. 



The ordinary middle fovea is rather large, shallow, and forms the apex 

 of the posterior declivity, which is well defined, forming a triangle a little 

 larger than broad. Seen in profile, the back of the cephalathorax is 

 straight and gradually ascending about to the middle of the pars cepha- 

 lica, where it is convex, and then slightly sloping toward the eyes; the 

 pars cephalica has above some foreward-directed hairs. The height of 

 the clypeus is a little greater than the length of the area of the central 

 eyes and nearly equals the length of the line occupied by three eyes of 

 the front row. Sternum large, a little longer than broad, slightly rounded 

 on the sides, broadly truncate in front, slightly convex, shining, strewed 



