4^2 BULLETIlSr UNITED STATES GEOLOGICAL SURVEY. 



sizes and position as in that species; the distance between the anterior 

 lateral eyes and the margin of the clypeus appears, however, to be a 

 little greater, somewhat more than half again as great as the diameter 

 of the eye, and the interval between the anterior and posterior lateral 

 eyes is also somewhat greater than in G. cooispersa, nearly half again 

 as great as the interval between the lateral and central eyes of the hind 

 row. The mandibles are less strongly convex atthe base; in other respects 

 they are as in the former species, equaling in length the patellae of the 

 first pair. The legs are of nearly the same relative lengths as in G. con- 

 spersa, but somewhat more slender; the thighs and the four anterior 

 metatarsi are armed with the same number of spines as in that species ; 

 but the tibife of the first pair have 2. spines near the apex below, and the 

 tibia of the second pair 2. 1. 1. (or 2. 2. 1.) spines below, and the tibise 

 both of the first and second pairs 1. spine above. The abdomen ap- 

 pears to be more elongate than in G. conspersa, being neariy double as 

 long as broad. The vulva is quite different from that of G. oonspersaj it 

 consists of a fovea, which is a little longer than the diameter of the 

 tibipe, somewhat longer than broad, somewhat dilated from the ends to- 

 ward the middle, nearly rhomboidal, but truncated in front and with a 

 depression in the middle, behind, of the limiting margin ; the anterior 

 margin is produced backward as a thick, transversely striated, blunt 

 process, reaching the center of the vulva ; along the middle, the bottom 

 of the fovea forms an uneven, elevated lamina about double as broad as 

 the said process, nearly double as long as broad, and having a longitu- 

 dinal depression anteriorly, on which the process is reposing ; on each 

 side, between this lamina and the margin of the vulva, is a large oblong 

 fovea. 



Color. — CephalotJwrax dark and dull brownish, with darker impres- 

 siones cephalicse and furrows, and with a fine black margin ; it is covered 

 "with appressed grayish or somewhat reddish-brown hairs, and spread with 

 longer upturned black ones. Sternum, mandibles, maxillce, and labium 

 blackish-brown. Palpi and legs blackish-brown, paler, brownish-yellow 

 toward the base. Abdomen brownish, covered with appressed grayish 

 or somewhat reddish-brown hair, and spread with longer, more upturned, 

 black hair. The vulva is brownish, the middle lamina paler, blackish at 

 the apex. 



Length of body llf , of cephalothorax 4J millim. ; breadth of cephalo- 

 thorax a little more than 3, of clypeus 1| millim. Length of legs: I 10^, 

 II 9f, III nearly 9, IV 12J millim. ; of patella + tibia IV 3| millim. ; 

 length of mandibles nearly li millim. 



One female example was found at " Garden of the Gods ", Colo., July 

 13. The species appears to be closely allied to G. brumalis Thor.,* from 



* Notice of Some Spiders from Labrador, in Proceed, of the Boston Soc. of Nat. Hist., 

 xvii, p. 497. — The words " cephalothorace breviore quam ", etc., in the diagnosis of 

 this species, is a slip of the pen for " cephalothorace longiore quam ", etc. In the diag- 

 nosis of CluUona frigidula Thor., ibid., p. 496, "20 aculeis" is an error of the press 

 instead of " 2 aculeis ". 



