AMERICAN COLEOPTERA. 307 



and feebly impressed, nearly smooth at apex and base, pubesence fine and short. 

 Scntellum yellow. Body beneath sparsely punctured and slightly pubescent. 

 Length .18-.26 iuch ; 4.5-6.5 millim. 



Male. — Antennae with joints 2-3 small, globular, 4-10 with a long branch, 

 eleventh joint nearly as long as the five preceding joints together, equalling in 

 length the process from the tenth joint. Elytra at tip absolutely simple as in the 

 female. Anterior and middle tarsi scarcely dilated. 



Female. — Antennae subserrate, the second joint alone small. 



I have one male in my cabinet with the elytra pale. This style of 

 variation seems to be usual in those species, which occur west of the 

 Rocky Mountains. I have never observed any tendency in the Atlantic 

 species to have the elytra become paler. 



I have seen six specimens collected in Western Nevada. 



2.— C. Crotclli Horn, Trans. Am. Ent. Soc. 1874, p. 41. 

 In all the specimens I have seen of this species the elytra are pale 

 reddish yellow, the suture and apical margin narrowly bordered with 

 piceous. 



Male. — Antennae pectinate from the third joint, second small, globular. Elytra 

 at tip feebly impressed. Anterior and middle tarsi distinctly dilated. 

 Female. — Antennae slender and very feebly subserrate. 

 Collected by Mr. Crotch at Crystal Springs, California. 



3.— C. abnormis Horn, Trans. Am. Ent. Soe. 1874, p. 40. — Black, thorax 

 red. 



Male. — Antennae feebly serrate. Anterior and middle tarsi dilated. Posterior 

 tibiae arcuate and obliquely sulcate. 



Female has not been identified with certainty. 

 Occurs in California and Colorado. 



4. — C distingueiida Horn, loc. cit. p. 42.— Nearly black, thorax red ; 

 antennae subserrate in both sexes. 



Male. — Elytra smoother at apical third and yellow, the tips prolonged, acute 

 and slightly reflexed. 



Female. — Elytra nearly equally punctured, tip not prolonged nor yellow. 

 Collected at San Buenaventura and Visalia, California. 



5.— C. Barcli Horn, loc. cit. p. 42. — Piceous, thorax red, elytra with a pale 

 vitta extending from the humeri to near the tip. Antennae subserrate in both 

 sexes. 



Male. — Sexual characters as in the preceding species, but the tip is rather less 

 prolonged. 



Female as in dieting uenda. 

 Collected at San Buenaventura, California, by Mr. Crotch. 



C— C. funebris Horn, Trans. Am. Ent. Soc. 1871, p. 280.— Body and legs 

 entirely black, elytra with slight pruinose lustre. 



Male. — Elytra tipped with yellow and smoother, not convex nor impressed. 

 Female. — Elytra concolorous, equally punctured. 

 Occurs widely diffused in California. 



