NEW NORTH AMERICAN PSELAPHID^. 459 



slightly wider than the head. Elytra oue-third longer than the prothorax, 

 at apex more than twice as wide as the latter; sides strongly divergent, 

 strongly arcuate; humeri rounded, slightly tumid; disk much wider than 

 long, feebly convex, coarsely but not very densely punctate, truncate be- 

 hind, the edge densely fimbriate; sutural strire deep, straight, beginning 

 distinctly before the b.isal margin; discal arcuate, fine, terminating at nearly 

 one-third the length from the apex. br.)adly dilated and deeply impressed 

 toward base. Abdomen fully as wide but scarcely as long as the elytra; 

 sides parallel, strongly arcuate; bordt-r wide; surface impunctate, strongly 

 convex; basal carina strong. Length 2.0-2.2 mm. 



California (Lake Tahoe 11). 



Tlie description is drawn from the male, the sexual modi- 

 fication consisting of a very feeble impression in the middle 

 of the abdomen near the base, and a small deep emargina- 

 tion at the apex of the terminal segment. The female dilBfers 

 but slightly, the terminal segment of the abdomen being 

 broadly angnlate at apex. 



This species was taken rather abundantly under the bark 

 of various fallen conifers. 



BATRISUS Aub^. 



B. cephalotes n- sp- — Somewhat robust, very convex, piceous; legs and 

 antennae pale rufo-ferruginous throughout; pubescence long, coarse, erect, 

 sparse, much denser on the head behind and beneath the eyes, short on the 

 vertex; integuments polished. 



Male— Head very large, distinctly wider than long and wider than the 

 prothorax; surface feebly convex; apex veiy broadly and evenly arcuate 

 throughout the width between the very widely distant antennre; sides par- 

 allel; eyes very small, on the sides just behind the middle, convex, promi- 

 nent; foveae round, moderate in size, spongiose, at one-third the length from 

 the base, mutually twice as distant as either from the eye; connecting chan- 

 nel feebly impressed, becoming obsolete anteriorly near the edge of the 

 frontal declivity; vertex abruptly declivous between the antennae, having in 

 the middle of the lower edge two very approximate teeth, each of which has 

 a deep setigerous puncture on the upper surface near the outer edge; later- 

 ally the lower edge is setigerous; vertex beneath the dentiferous edge very 

 deeply excavated throughout the width between the bases of the antennae; 

 clypeus angnlate at the sides, with the edges reflexed, more strongly so at 

 apex which is transversely sinuate; portion before the reflexed apex in the 

 form of a large setigerous tubercle which is further advanced than the two 

 teeth of the iipper surface; labrum broadly sinuate, anterior angles promi- 



