THORELL ON ARANE^E OF COLORADO. 499 



The central eyes occupy an area slightly broader than long, and scarcely 

 perceptibly broader behind than in front; the lateral eyes of the ante- 

 rior row are at least half again as large as the fore centrals, the eyes of 

 this row being at equal distances from each other ; the eyes of the hind 

 row are of equal size, the lateral ones being somewhat more distant 

 from the centrals than these from one another. The *term«m is about as 

 broad as long, nearly heart-shaped, truncate in front. The mandibles are 

 small and perpendicular, their length is not half again as great as the 

 height of the clypeus. The palpi are very short; their patellar joint is 

 as long as broad and of equal breadth when seen from above, gradually 

 incrassated toward the apex when seen from the side ; the tibial joint is 

 shorter than the patellar, seen from above transverse and somewhat 

 oblique, the outer side being longer than the inner; the apex of the 

 outer side is drawn out into a rather strong forward-directed process, 

 which is about as long as the joint itself, straight, and tapering toward 

 the pointed apex. The tarsal joint, or lamina bulbi, is longer than the 

 two preceding joints together, much broader than they, convex longi- 

 tudinally, nearly ovate; the bulbus is surrounded by a very long and 

 fine black spine, the extremity of which forms a circular coil on the 

 outer side of the bulb, toward its apex. The legs are long and slender, 

 armed with fine spines. The abdomen is much longer than broad, ovate ; 

 as well the cephalothorax as the abdomen is, in the only quite bare- 

 rubbed example that I have seen, very thinly scattered with small ele- 

 vated tubercles, which probably have borne each a bristle or hair; the 

 legs of the first and fourth pairs are wanting in this example and nearly 

 all the spines rubbed off. 



Color. — Cephalothorax brownish testaceous, thinly strewed with small 

 dark points, and provided with two brown longitudinal bands toward the 

 sides, each ending with a black spot behind ; the extreme margin is black, 

 the pale space between the margin and the lateral bands rather narrower 

 than the bauds, the pale middle space broader, gradually narrowing 

 backward, with the large lateral eye-tubercles whitish. Sternum and 

 parts of the mouth testaceous, the mandibles, however, grayish testaceous, 

 whitish at the apex, and there marked with a small, brownish-red, trans- 

 verse line; thejM7j>i are pale testaceous, with the tarsal joint grayish- 

 whi te ; the extreme apex of the process of the tibial joint is black, as is also 

 the long spine of the bulb. The legs are dusky yellow or testaceous, the 

 thighs thickly sprinkled with small brownish -red spots and points; in the 

 anterior legs, at least those of the second pair, the thighs have a narrow, 

 the tibifB a broader, brownish-red ring at the apex, the metatarsi and tarsi 

 have their apical half reddish-brown, the extreme apex, however, of the 

 tarsi being pale. The posterior legs, at least those of the third pair, 

 are without rings. The back of the abdomen is, on its anterior half, pale 

 grayish-brown, thinly strewed with some small blackish points; it is 

 surrounded by a paler whitish band, and on its posterior half are two 

 rather broad longitudinal reddish-brown bands reaching from the mid- 

 dle of the back to the anus, converging backward, and coarsely den- 



