THORELL UN ARANE.E OF COLORADO. 505 



the two central ones is fally as great as their diameter, ami at least 

 half again as great as that between them and the lateral eyes. The 

 area occupied by the four posterior eyes is but slightly longer than 

 broad in front, its breadth behind surpasses the breadth in front with 

 about the diameter of one of the two large eyes of the middle row, which 

 eyes are separated by an interval somewhat greater than their diameter ; 

 the interval between them and the eyes of the hindmost rows is 

 about double as great as the diameter of one of these latter eyes. Man- 

 dibles as long as the tarsi of the first pair. Palpi and legs of the ordi- 

 nary form, the fourth pair of legs at least four times as long as the cepha- 

 lothorax, the second pair scarcely longer than the third. The spines 

 of the legs are in part very long, the tibise of the four anterior legs have 

 2. 2. 2. spines beneath, the apical pair being much shorter than the oth- 

 ers, and besides 1. 1. short spines in front and behind. The ahdomenis 

 elliptical or rather inversely ovate; the vidva has the form of a rather 

 large corneous area gradually narrowing forward, almost inversely 

 ovate, rounded in front, and there linjited by an elevated margin, more 

 truncate behind ; near its broad, blunt, posterior extremity it shows two 

 large profound circular foveoe; the part of the area which separates these 

 foveje is narrow, xshaped, and from this septum proceed forward, 

 nearly to the apex of the area, two fine furrows limiting three fine nar- 

 row costse gradually converging forward. 



Color. — Cejjhalothorax brownish-black, with three longitudinal, nar- 

 row, dusky testaceous bands covered with grayish-white hair; the 

 middle band reaches only to the pars cephalica, and is slightly 

 tapering backward and geminated anteriorly by a fine black line ; the 

 side-bauds, which are continued along the cheeks and meet under the 

 front row of eyes, are continuous, uneven in the margins, as broad as 

 the middle band and as the dark space betvreen them and the extreme 

 margin of the cephalothorax, but scarcely half as broad as the two 

 spaces between the bands. Sternum dusky yellow, surrounded by a 

 row of small black spots at the very margin, and with a large, black, 

 ovate, middle patch, geminated along the greatest (anterior) part of its 

 length by a yellowish line. Mandibles dusky yellow with blackish spots ; 

 maxillce and labium yellowish, this latter dark at the base. Palpi and 

 legs duskj' yellow, paler at the base, with blackish rings and spots. 

 The coxse are yellow beneath ; the thighs have three (or four) more or 

 less distinct irregular rings formed of blackish spots, the tibiie and 

 metatarsi have three more regular blackish rings. The spines and 

 bristles are black. Abdomen blackish-brown above, with a lanceolate 

 pale brownish band (which appears to have been covered with grayish- 

 white hair) along its anterior part; behind this band, which does not 

 reach the middle of the back, are two rows of small ])ale brownish spots 

 close together and converging toward the anus, the posterior spots 

 being united transversely two and two into short angular lines, or spots; 

 more outward, the hinder part of the abdomen shows two rows of 



