490 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



shortish, situated between the coxte of the second and third pairs, the 

 cephalic impressions and two other farrows on each side are flneand shal- 

 low. The cephalothorax is densely clothed with short, appressed hair, and 

 strewedwithlong,uptarned, bristly hairs. *Sterm«?w nearly elliptical, trun- 

 cate io front, hairy. The hind row of eyes is rather strongly curved back- 

 ward, the front row curved d own ward; a line tangent to the upper margins 

 of the fore lateral eyes will cut the fore centrals a little below their middle. 

 The fore lateral eyes are oblong, little larger than the posterior eyes, 

 and double as large as the fore centrals ; the area occupied by the cen- 

 tral eyes is very nearly rectangular, scarcely perceptibly broader behind, 

 much longer than broad ; the interval between the flat and somewhat 

 oblique hind centrals is little smaller than that between the fore cen- 

 trals, this latter interval being as great as their diameter, and greater 

 than the interval between them and the fore laterals ; the interval be- 

 tween these eyes and the margin of the clypeus is about half again as 

 great as the diameter of one of these eyes and smaller than that which 

 separates them from the hind laterals, this latter space being double as 

 great as the diameter of the eyes, and a little greater than the interval 

 between the hind central and hind lateral eyes. The mandibles are 

 rather small, a little narrower than the thighs of the first pair, as long 

 as the patellas of the first pair, double as long as broad, strongly con- 

 vex at the very base, otherwise but slightly convex longitudinally, 

 clothed with bristly hairs; the posterior margin of the claw-furrow 

 forms a denticulate lamella ; the claw is short, strong. The maxilhe are 

 strongly rounded on the outer side, with a rather deep transversal depres- 

 sion in the middle; they are curved round the laMum^ which is about 

 half as long again as broad, somewhat tapering toward the broadly 

 rounded apex, slightly rounded in the sides. The palpi and legs are 

 short, the tibial joint of the former only half as long again as broad. 

 The fourth pair of legs is not much (little more than the length of 

 their tarsus) longer than the first pair. The thighs have 1. 1. spines 

 above the first pair besides 1., the second 1. 1. in front, the third and 

 fourth have 1. 1. in front, 1. 1. behind ; the four anterior metatarsi have 

 only 1. 1. spines, situated toward the base below ; the tibiae of the first 

 pair have only 1., and thetibite of the second pair only 1. 1. spines near 

 the apex below. The patellie and tibiie are destitute of spines above 

 (L e., along the middle line of the upper part), with exception of the 

 tibioe of the third pair, which have 1. spine above. The tarsi and 

 metatarsi of the four anterior legs are provided with a scopula. The 

 abdomen is inversely ovate, densely covered with shorter appressed hairs 

 and spread with longer upturned ones. The vulva has the form of a 

 shallow, oblong, egg-shaped fovea, the length of which is not greater 

 than the diameter of the tibise ; in front, this fovea is occupied by a 

 nearly half- moon -shaped eminence or ridge, emarginate behind, and con- 

 vex transv^ersely ; the much longer, lower, hinder part of the bottom is 

 flat, tongue-shaped. 



