100 CASEY 



rather sparsely punctate, the process not very broad, rounded at 

 tip, the marginal bead moderate; abdomen and hind femora 

 minutely, remotely punctate. Length 15.5 mm. ; width 6.6 mm. 

 (9). Mt. Diablo. A single specimen taken by the writer. 



obsidiana n. sp. 



Form much more slender, more convex, parallel, deep black, the tarsi 

 piceous, glabrous, alutaceous, the elytra polished; head finely, 

 rather sparsely punctate, the sinus shallow and parabolic, the lobes 

 unimpressed, the anterior canthus rounded, much less prominent 

 than the posterior; prothorax short, a little more than one-half 

 wider than long, the sides parallel and straight to slightly before 

 the middle, then broadly rounded, becoming rather strongly con- 

 vergent and but feebly arcuate thence to the angles, which are ob- 

 tuse and bluntly rounded, the apex two-thirds as wide as the base, 

 with the circularly rounded sinus shallow; surface sparsely, ex- 

 tremely minutely and feebly punctate, only a little more distinctly 

 punctured and still rather sparsely and very finely so toward the 

 sides, the marginal bead fine; scutellum moderate, transversely 

 and obtusely triangular ; elytra relatively very long, as wide as 

 the prothorax and almost three times as long, fully three-fourths 

 longer than wide, the apex rapidly narrowed and obtuse, ogival, 

 the surface nearly smooth, very minutely, remotely punctate 

 throughout; prosternum sparsely, extremely minutely punctate, 

 the process parallel, rounded at tip, strongly margined; hind 

 femora and abdomen very minutely, sparsely punctate. Length 

 13.0 mm. ; width 5.25 mm. California. Cab. Levette. 



cylindrica n. sp^ 



8 Anterior canthus less prominent than the posterior 9 



Anterior and posterior canthi subequally prominent 10 



9 Body parallel, moderately convex, black, alutaceous, the elytra 

 less so; punctures bearing very small, decumbent and rather dark 

 hairs ; head coarsely, rather closely punctate, more finely toward 

 base, the lobes broadly rounded, thick, unimpressed, the sinus circu- 

 larly rounded, shallow ; anterior canthus rather broadly rounded ; 

 prothorax one-half wider than long, the sides parallel and nearly 

 straight, becoming gradually rounded and strongly convergent 

 before the middle, the apex moderately sinuate, two-thirds as wide 

 as the base, the angles obtuse though only slightly blunt ; surface 

 sparsely, very finely punctate, gradually not very coarsely but 

 strongly and still rather sparsely so laterally, the lateral bead 

 moderately thick; scutellum moderate, sharply triangular, but 

 slightly transverse ; elytra two-thirds longer than wide, gradually 

 and rather acutely ogival at tip, the sides straight and parallel in 

 basal two-thirds; surface nearly smooth, not very finely, very 

 deeply and sparsely punctate, a little less sparsely though not much 

 more coarsely laterally; prosternum finely, sparsely punctate, the 

 process rather wide, constricted at the coxas, rounded at tip, where 

 the beaded margin becomes subobsolete ; hind femora rather finely 



