AMERICAN COMPONENTS OF THE TENTYRIIN^ 373 



gradually narrowed [converging] to the hind angles, which are 

 rectangular; elytra elongate-oval, subparallel in front, moderately 

 convex, with stride of finely muricate punctures, confused at base 

 and less distinct at apex ; under surface coarsely but not densely 

 punctured, the alxlomen paler, more shining and scarcely at all 

 punctured. Length 6.5 mm. Nevada abnorme Horn 



Head rather finely and not densely punctured 3 



2 — Form elongate, moderately convex, shining, pale and uniform 

 castaneous in color throughout ; head as long as wide, very convex 

 anteriorly, the epistoma sloping anteriorly from the elevation, the 

 punctures small, well separated, elongate in form and streaming 

 obliquely outward from the median line anteriorly, forming fine 

 longitudinal folds toward the strong supra-orbital carina ; last 

 antennal joint ( 9 ) scarcely as long as the two preceding com- 

 bined ; prothorax small, nearly three-fourths wider than long, 

 widest at apical third, where the sides are strongly rounded, 

 thence converging and straight to the basal angles, which are 

 obtuse but not at all rounded, converging and arcuate to the acute 

 and anteriorly prominent apical angles, the apex broadly, evenly 

 sinuate, equal in width to the base, which is strongly and rather 

 narrowly lobed in the middle ; punctures very slighdy elongate, 

 sparse and moderately small, becoming gradually close-set and 

 coarse but scarcely confluent laterally, with an incomplete im- 

 punctate median line ; scutellum as long as wide, ogival at tip, 

 narrowed somewhat at base; elytra nearly three-fourths longer 

 than wide, four times as long as the prothorax, and, at the middle, 

 one-half wider, the sides broadly arcuate, the apex gradually 

 acutely ogival, the humeri broadly exposed at base, rounded, the 

 punctures fine, sparse, shallow, scarcely muricate, subequal in 

 size, confused toward the suture, forming approximate series out- 

 wardly continuous from base to apex; metasternum sparsely, 

 moderately coarsely and muricately punctate, the abdomen not 

 evidently punctate medially. Length 6.4 mm. ; width 3. 38 mm. 

 California (Barstow) castaneum n. sp. 



Form shorter and stouter, convex, somewhat alutaccous, dark piceo- 

 rufous, the elytra blackish, the legs paler rufous ; head slightly 

 wider than long, nearly as in castaneum but feebly impressed 

 along the median line and without the pronounced convexity in- 

 volving the apex of the front and base of the epistoma, the last 

 antennal joint in the type but little more than one-half longer 

 than the tenth ; prothorax nearly similar but less transverse and 

 more broadly rounded at the sides, about one-half wider than long, 

 the apex more feebly sinuate, with the angles less anteriorly 

 produced and the basal lobe broader, the punctures nearly similar 

 but less sparse medially and without a median impunctate line, 

 the latter however apparently very feebly elevated behind the 

 middle and with a fine stria near the base ; scutellum subsimilar ; 

 elytra much shorter, distinctly inflated behind the middle, one-half 



