AMERICAN COLEOPTERA. 183 



this species the hind angles of the thorax are less decidedly rect- 

 angular, in mimus very distinctly so. 



Occurs rather abundantly at Tejon, two others were sent me from 

 the Sierras, probably near Calaveras, by Henry Edwards, these latter 

 are smaller and more convex. 



C. subtilis Schaum, Berlin Zeitschr. 1863, p. 72, pi. 3, fig. 7.— Moderately 

 elongate, black, subopaque. Head moderately elongate, smooth, gense acutely 

 incised. Thorax cordate, as broad as long, sides in front arcuate, posteriorly 

 oblique with feeble sinuation, margin moderately reflexed, disc nearly flat, 

 impressions feeble. Elytra oval moderately ventricose, not striate but with 

 series of rather finely impressed punctures not closely placed, which are some- 

 whatconfused at the sides, iuflexed portion sparsely punctate. Body beneath 

 black, shining. Length .68 — .80 inch; 17 — 20 mm. 



This species has been supposed to be merely a variety of the next, 

 but the narrower and not constricted thorax, with the elytral sculpture 

 seem valid characters. 



This species occurs at Los Angeles and Mariposa, California. 



C striatopunctatus Chaudoir, Bull. Mosc. 1844, iii, p. 476; alternatus 

 Motsch. Bull. Mosc. 1859, iii, p. 162, pi. 3, fig. 12; ovafis Mots. loc. cit. fig. 11.— 

 Moderately elongate, black, shining. Head moderately long, not punctured, 

 genae not incised but sinuate. Thorax broadly cordate, sides in front strongly 

 arcuate, posteriorly deeply sinuate, hind angles rectangular, margin moder- 

 ately reflexed, disc moderately convex, subopaque, anterior impression nearly 

 obliterated, the median more distinct, the posterior deep. Elytra oblong oval, 

 ventricose, margin moderately reflexed, surface with fine but distinctly im- 

 pressed strise with fine punctures, the intervals flat, each alternate interval 

 near the apex '^ or from behind the middle 9 with a supplementary row of 

 punctures, inflexed portion obsoletely punctured. Body beneath smooth, shin- 

 ing. Length .68— .96 inch; 17—24 inch. 



There is no species of this group with which the present might be 

 confounded, but with ventricosus of the preceding group there might 

 be some difficulty. On comparing the two superficially, the thorax of 

 the present is always distinctly broader and the disc more convex. 

 The elytra here are finely striate, in ventricosus more deeply, while 

 in their outline the present species has nearly truly elliptical elytra 

 scarcely more narrowed at apex than at base, while in ventricosus the 

 elytra are oval. This latter character requires considerable experience. 

 There need be no difficulty at all in separating the males. On com- 

 paring the females it will be seen that the elytral stride become deeper, 

 and the intervals narrower behind the middle in ventricosus, while 

 in the present species the intervals have the supplementary row 

 of punctures. 



This species occurs in the coast range region south of San Fran- 

 cisco, and is not rare. 



