^24 BULLETIN IJNiTEiD STATES GEOLOGICAL SUKVEY. 



(by about one-fourth of the breadth in front), and its greatest breadth 

 surpasses the length by one-third of the former. Front row of eyes 

 curved rather strongly upward ; a straight line tangent to the upjper 

 margin of the central eyes would cut the lateral eyes a little above their 

 center ; the central eyes of this row, which are separated by a very dis- 

 tinct interval, are not very large, their diameter being about double that 

 of the laterals, from which they are removed by an interval about half 

 as great as the diameter of these latter eyes ; they are not perfectly 

 visible when the cephalothorax is viewed from above. The eyes of the 

 second row are very small, their distance from the eyes of the third row 

 nearly double as great as that which separates them from the fore lateral 

 eyes; the three eyes on each side form a row rather strongly curved 

 downward (outward) ; the hindmost eyes are placed much (at least as 

 much as their diameter) higher than the fore lateral eyes. The interval 

 between the two hindmost eyes, which are not very much smaller 

 than the fore laterals, is a little greater than that which separates them 

 from the lateral margin of the cephalothorax. Mandibles short and 

 broad, tapering toward the apex, somewhat flattened, seen in profile 

 rather convex but not geniculate toward the base, coarsely and trans, 

 versely striato-rugose. Palpi and legs very hairy ; the first pair of legs 

 are much stronger than the others, the fourth pair nearly two and a 

 half times as long as the cephalothorax ; the patella and tibia of this pair 

 are together much longer than these joints of the third pair ; the meta- 

 tarsus of the fourth pair is slightly longer than the tibia, and armed 

 with several spines, not only at the apex. The tibise of the first pair, 

 which are very thickly hairy on the under part, have there 1. 2. 2. 

 (2.2.2.?) short and very strong spines, the two spines toward the 

 outer side and the apex of the joint being tooth-like. The coxse of the 

 first pair are separated by an interval nearly as great as the breadth of 

 the labium. The abdomen is elongate, about half again as long as broad, 

 ovate 5 the vulva has the form of a rather large deep transverse fovea, 

 the breadth of which equals the diameter of the hindmost tibiae ; the 

 anterior margin of the fovea is somewhat drawn out forward in the 

 middle, and also the hind margin is slightly prominent in the middle ; 

 behind this fovea is another much smaller one, over which the hind 

 margin of the large fovea is arched. The maniillce are rather short. 

 Color.- — Ceplialothorax black, the appressed hair with which it is 

 clothed grayish, especially on the sides of the pars cephalica, in front, 

 the more erect hairs being black ; the clypeus and the narrow eye-rings 

 are grayish-white ; the long hairs with which the margin of the clypeus 

 is covered are of a purer white color. Sternum, maxilke, and labium 

 black, black-haired, the latter pale at the apex. Uyes of the front row 

 greenish-yellow, the hindmost eyes blackish. Mandibles shining green, 

 with metallic luster, the claw piceous, rusty-red at the apex. The palpi 

 are yellowish-brown, paler yellowish at the base, darker at the apex, 

 and covered with shorter whitish and long black and white hairs, the 



