NEW NORTH AMERICAN PSELAPHID^E. 471 



prothorax together, rather slender, basal joint as long as the next two to- 

 gether, subcylindrical, second narrower, second and third slightly longer 

 than wide, the latter slightly shorter and narrower, four to eight equal in 

 width, slightly shorter but scarcely narrower than the third, ninth wider, 

 nearly as long as wide, tenth wider than the ninth, wider than long, eleventh 

 distinctly wider than the tenth, ovoidal, acuminate, as long as the three 

 preceding together; on a line through the anterior portions of the eyes there 

 are two small, very widely distant nude punctures; fourth joint of maxillary 

 palpi dilated internally, truncate at apex, having a slender terminal process. 

 Prothorax distinctly wider than the head, one-fifth wider than long; sides 

 strongly rounded just before the middle, convergent and very feebly sinuate 

 toward base; the latter evenly, feebly arcuate, four- fifths as wide as the disk, 

 one-third wider than the apex; the latter truncate; disk strongly convex, 

 with a row of small punctures along the basal margin, very feebly impressed 

 at each side near the base, with a small, deeply impressed, nude fovea in the 

 middle and very near the basal margin. Elytra near the apex nearly twice 

 as wide as the prothorax; sides moderately divergent from base to apex, 

 arcuate; disk fully as long as wide, convex; sutural striae distinct, strongly 

 arcuate; discal fine, distinct, terminating at the middle; humeri rather 

 strongly tumid. Abdomen much shorter than the elytra, parabolically 

 rounded throughout; border narrow, rapidly becoming extinct; surface con- 

 vex and declivous posteriorly from the apex of the first visible segment; the 

 latter as long as the next two together, transversely very feebly convex. 

 Legs long, slender, simple; tarsislender. Met asternum broadly and strongly 

 impressed along the middle; posterior coxae rather widely separated. Length 

 1.4 mm. 



California (Lake Tahoe 2). 



The type specimen is a male, the under surface of the 

 abdomen near the apes being broadly and feebly impressed. 

 With this specimen I have associated a female, which dif- 

 fers considerably in the much shorter elytra, with more 

 strongly divergent sides; but the material is insufficient to 

 permit definite conclusions regarding its identity. 



The individual facets or granules upon the surface of the 

 compound eyes are circular and very widely separated. 



This species is very nearly related to sonomce, but differs 

 in its slightly more robust form and slightly more trans- 

 verse prothorax, with more angulate sides. It occurs under 

 chips and bark slightly buried in grassy turf. 



