568 Coleopterological Notices, V. 



but deep and dense throughout, gradually scarcely larger but extremely dense 

 and contiguous at the sides, also coarser along the basal margin. Elytra at 

 basal fourth quite distinctly wider than the prothorax, not quite twice as long ; 

 punctures close throughout, fine near the base, gradually, at about basal third, 

 becoming coarse, very deep, extremely dense and subaciculate to the apex ; 

 marginal stria inferior, extending along the apex to the suture ; outer sub- 

 humeral very close to the marginal but not confluent ; oblique humeral fine, 

 generally joining the inner subhumeral, which extends to apical fourth ; 

 dorsals moderate, acute externally, pnnctulate internally, nearly straight, 

 gradually decreasing in length, the first extending to apical third, the fourth 

 to or slightly beyond the middle, abruptly arched at base joining the entire 

 sutural. Pygidia rather finely but deeply, extremely densely punctate. Pro- 

 sternum convex, the striae remote, rapidly ascending ; surface finely, extremely 

 densely and deeply punctate ; subapical fovese deep ; mesosternum sparsely 

 punctate, the marginal stria entire. Anterior tibiae with five or six low broad 

 and oblique serrulations. Length 3.3-3.7 mm. ; width 2.3-2.4 mm. 



California (Humboldt Co.). 



This species is closely allied to insertus, but differs greatly in its 

 deep black, less shining, more coarsely and much more densely 

 punctate integuments, and very much in the structure of the an- 

 terior tibiae, which, in insertus, are armed externally with a close- 

 set series of long slender erect and spinuliform denticles. In in- 

 sertus, also, the external subhumeral stria is not visible, being 

 perfectly confluent with the marginal stria throughout its length. 

 Three specimens. 



S» cribmni. — Evenly oval, strongly convex, black, the legs just visibly 

 picescent; lustre moderately shining, the narrow interspaces between the 

 punctures polished. IJead finely but strongly, very densely punctate, the 

 marginal stria feebly traceable at each side of the epistoma, which is much 

 wider than long. Protho7-ax ratber more than twice as wide as long, the sides 

 not fimbriate, strongly convergent and feebly, almost evenly arcuate from 

 base to apex ; marginal stria fine ; disk ratber coarsely deeply and very 

 densely punctate throughout, the punctures separated by nearly their own 

 diameters toward the middle. Elytra nearly as long as wide, three-fourths 

 longer than the prothorax, and, at basal fourth, but little wider ; sides broadly, 

 evenly arcuate ; disk rather coarsely, very deeply and densely punctate, the 

 punctures longitudinally subcoalescent except near the scutellum; marginal 

 stria strongly inferior, almost straight, continued along the apex to the middle 

 of each elytron ; outer subhumeral almost obsolete but distinct from the mar- 

 ginal ; inner subhumeral represented by a short stria behind the middle ; 

 oblique humeral distinct ; dorsals coarse but scarcely at all punctate, only 

 very feebly arcuate, the first extending to apical fourth, the fourth to apical 

 third, the latter abruptly, transversely hooked at base nearly to the scutel- 

 lum ; sutural obsolete in basal fourth, almost attaining the apex. Propygidium 



