DESCRIPTIONS OF NEW SPECIES. 173 



One male, Virginia City, Nevada, Mr. Edwards. Nearly 

 allied to X. Agassizii Lee., but the prothorax is distinctly nar- 

 rowed behind and subsinuate, very much as Spondylis upiformis, 

 and the sculpture of the elytra is not suddenly finer behind the 

 middle. 



The convex sides of the prothorax are less coarsely and more 

 densely punctured than the disk. The antennae are two-thirds 

 the length of the body, quite hairy, and the 4th joint is very 

 little shorter than the 5th. 



GANIItt US LEG. 



Head moderately large, eyes coarsely granulated, deeply emar- 

 ginate, lower lobe very large, gense extremely short, front short, 

 perpendicular ; mandibles short, stout, acute at tip, external 

 outline with a well-defined obtuse angle near the tip, so that the 

 front margin is straight and ti'ansverse ; palpi very unequal, last 

 joint triangular, obliquely truncate. Antennae () longer than 

 the body, llth joint indistinctly divided; 1st joint thicker, and 

 about two-thirds as long as the 3d joint, very rough with small 

 acute spines, 3d and following rough but gradually becoming 

 smoother, fringed beneath but not densely with hairs, which also 

 gradually become thinner and shorter. Prothorax wider than 

 long, feebly rounded on the sides, not constricted either before or 

 behind, transversely impressed before the base, which is produced 

 into a broad subtruncate lobe ; disk rather flat, with a narrow, 

 smooth dorsal line, and two vague discoidal impressions ; scutel- 

 lum broad, rounded behind ; elytra as wide at the base as the 

 thorax, gradually narrower behind, and rounded at tip. Pros- 

 ternum laminiform between the coxae, but not prolonged as in 

 Oeme ; surface in front of coxae finely transversely rugose, and 

 depressed each side ; the finely roughened dorsal surface extends 

 on the flanks to the prosternal suture, as in Eucrossus, and Oeme, 

 in which the prosternum is similarly sculptured, but not depressed ; 

 the coxae are widely angulated externally, and the whole extent 

 of the coxal fissure is open, though not so widely as in Oeme. 

 The mesosternum is very narrow, and deeply sunk between the 

 coxae which are very large and prominent, and the cavities are 

 widely open externally; the hind coxae are prominent. Legs as 

 in the two genera just mentioned, thighs rather stout and com- 

 pressed, tibial spurs small, hind tibiae with 1st joint as long as 



