514 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



sloping and somewhat rounded ; the back, seen in profile, is very 

 slightly concavated between the hind declivity and the area of the pos- 

 terior eyes, which area is very slightly convex and sloping. The height 

 of the face scarcely equals the length of the mandibles. First row of 

 eyes nearly straight, but very slightly curved downward ; these eyes 

 are of equal size, the center ones separated by an interval as great as 

 their diameter and greater than the space between them and the laterals j 

 the area of the posterior eyes is much broader behind than in front, 

 slightly longer than broad in front, the interval between the two largest 

 eyes being a little greater than their diameter, the interval between 

 them and the hindmost eyes scarcely double as great as the diameter of 

 these latter eyes. Mandibles about 2| times as long as broad ; the ante- 

 rior margin of the claw-furrow has three, the posterior two teeth. Legs 

 rather long, the fourth j)air about 4^- times as long as cephalothorax, 

 ■with the metatarsus as long as patella and tibia together ; the second 

 and third pairs are of very nearly the same length ; the four anterior 

 tibise have 2. 2. 2. spines below and 1. 1. in front, the first i)air besides 1., 

 the second pair 1. 1. behind. Ahdomen inversely ovate. The vulva con- 

 sists of a rather large, corneous, depressed area, which is double as broad 

 as long, slightly rounded in front, gradually and rather strongly nar- 

 rowing backward, with slightly rounded sides ; it is bordered on the 

 sides, as also in front toward the sides, by an elevated margin, and is 

 truncate behind ; it shows two large coarse costse curved outward and 

 strongly diverging forward, and reaching from the hind margin of the 

 vulva, where they nearly meet, to the vicinity of its anterior exterior 

 angles ; these costse and the lateral margins of the vulva limit two 

 rather deep, rounded fovese, one on each side. 



Color. — Cephalothorax black, with a large, very indistinct, paler patch 

 in the middle ; it appears to have been clothed with appressed, rusty- 

 brown hair. Sternum black, covered with grayish hair. Mandibles 

 blackish-brown, with a few paler patches, and sprinkled with grayish 

 hair. Legs black, with paler yellowish-brown rings; three very irregu- 

 lar ones on the thighs, two or perhaps three on the patelliie (less dis- 

 tinct), tibia, and metatarsi; the tarsi are broadly yellowish-brown at 

 the base. The pale rings and spots are covered with grayish or red- 

 dish-brown hair. The aljdomen is black above, the back shows traces of 

 having been clothed with rusty-brow-n hair, and to have been furnished 

 with small spots formed of whitish hair; the belly is brownish, and ap- 

 pears to have been covered with gra,yish- white hair. The vulva is brown. 



Length of body 9^, of cephalothorax slightly more than 4millim.; 

 breadth of cephalothorax 3^ millim. Legs : I, 12-^, II and III, 12i, IV, 

 17J millim. ; patella + tibia IV 5 millim. 



The only specimen of this species that I have seen is a bare-rubbed 

 female, captured at Manitou, Colo., July 6. 



26. L. iracunda n. 



Very hairy; cephalothorax black, with a pale, rather broad middle 



