THORELL ON ARANE.E OF COLORADO. 483 



witli fiue hairs. The eyes are small and of nearly equal size, with excep- 

 tion of the anterior central ones, which are evidently smaller than the 

 other eyes ; the anterior lateral eyes are little, if at all, larger than 

 the posterior central and lateral eyes. The hind row of eyes is, seen 

 from above, nearly straight; seen from iu front, this row is strongly 

 curved downward; the front row is curved a little upward. The cen- 

 tral eyes form a trapezium nearly double as broad behind as iu front, 

 and a little shorter tban broad behind. The interval between the pos- 

 terior central eyes, which is fully as great as the diameter of one of these 

 eyes, is a little smaller than that between the posterior lateral and cen- 

 tral eyes and as great as the interval between the anterior and posterior 

 centrals; the small anterior central eyes are nearly contiguous; the lat- 

 eral eyes of the same side are contiguous ; the interval between the an- 

 terior lateral and central eyes equals the diameter of the former. The 

 mandibles are ovato-cylindrical, strong, and thick, their length equaling 

 thrice the height of the cl3'peus ; seen from the side, they are nearly 

 ovate and strongly convex toward the middle; they are smooth, hairy 

 at the apex, with the claw-furrow armed with a single row of five rather 

 strong teeth. The niaxillce are about half as long again as broad, rounded 

 on the outer side toward the apex and at the apex, inclined toward the 

 labium, which is a little broader than long, rounded at the apex. Palpi 

 rather slender; the tibial joint, which is about two and a half times as 

 long as the patellar, is slightly and gradually incrassated toward the 

 extremity; the tarsal joint is very slightly narrowed toward the apex, 

 not longer than the two preceding joints together. The legs are of mod 

 erate length, rather slender, spread with longish not thickly set hairs - 

 the thighs are gradually, not abruptly narrowed at the base; the fourth 

 pair of legs is the longest, with the tibia at least three times as long as 

 the patella. The abdomen is inversely ovate, rather elongate, obtuse iu 

 front and behind, spread with fine, short hair, or down ; the vulva is very 

 simple, consisting of a rather large, uneven, transverse elevation at the 

 margin of the rima genitalis. 



Color. — Cephalothorax, mandibles, and maxillce brownish ; sternum dusky 

 testaceous, with the margins darker; labium blackish; abdomen oi an 

 olivaceous or brownish-gray hue ; palin and legs brownish-yellow, darker 

 at the extremity; the vulva forms a transversal area, which is black at 

 the ends and reddish-brown iu the middle, this middle portion being a 

 little broader than the black spots formed by the extremities of the area. 



Length of body 3i, of cephalothorax nearly IJ millim.; breadth of 

 cephalothorax 1 millim.; length of legs I a little more than 4, of legs II 



4, of III nearly 3i, of IV 4^ millim. 



A few female specimens of this species were found under stones on 

 Gray's Peak, a little below the summit, July 7. 



5, E. strabo n. 



Cephalothorax yellowish-brown, slightly ascending aud somewhat 



