Coleopterological Notices. 473 



Male. — Anterior tibije slender, the anterior surface polished, very finely, 

 sparsely punctate, strongly and obtusely toothed within at one-third the 

 length from the base, the portion thence to the base one-half as wide as the 

 remaining portion. 



Length 4.8-5.3 mm. ; width 2.0-2.4 mm. 



California (San Diego). 



The male is more slender than the female. The base of the elytra 

 being distinctly narrower than the base of the prothorax, together 

 with the deeply salcate eh^tra and equally convex intervals, will 

 render the identification of this species at all times a very easy 

 matter. 



C. alternafllS u. sp. — Oblong-oval, very convex, parallel, moderately 

 shining, black ; legs dark rufous ; vestiture as in sulcatus, very brittle and 

 easily removable. Head nearly as in sulcatus, but more coarsely and con- 

 lluently punctate. Prothorax four-fifths wider tlian the head and two-thirds 

 wider than long ; base much wider than the apex, broadly arcuate in the 

 middle, feebly sinuate laterally, the basal angles right, very narrowly rounded 

 and scarcely extending as far posteriorly as the median portion; apex very 

 feebly emarginate; sides evenly and rather strongly arcuate; disk widest in 

 the middle, very feebly explanate posteriorly but not perceptibly so anteriorly, 

 somewhat finely and extremely densely punctate, the punctures tending to 

 coalesce in short irregular rugae toward the sides, finer and not so coalescent 

 toward the middle. Elytra at base as wide as the base of the prothorax, 

 behind the middle very slightly wider than the disk of the latter and two and 

 one-half times as long ; sides feebly but distinctly arcuate ; disk with deep, 

 widely impressed sulcations which are somewhat finely and closely but ex- 

 tremely feebly punctured ; intervals very convex, alternately narrow, moderate 

 in elevation and as wide as the sulci, and wide and very strongly elevated, 

 very finely and somewhat densely punctured throughout. Abdomen very finely 

 punctate, the punctures sparse laterally, denser toward the middle. 



Mule. — Unknown. 



Length 6.3 mm. ; width 2.8 mm. 



California. 



The unique type is probably a female, as the anterior tibias are 

 not modified. It is closely allied to sulcatus, but may be readily 

 distinguished by the alternately wider, very strongly elevated and 

 more densely punctate intervals, by the decidedly coarser punctures 

 of the head and pronotum, more strongly rounded sides of the 

 latter and relatively narrower apex, by its much smaller head, by 

 the fact that the bases of the elytra and prothorax are equal in 

 width and by its much larger size. 



