286 GEO. H. HORN, M. D. 



C. slenoides Murr. — Elongate, slender, piceous black, opaque, sparsely 

 pubescent. Antennae testaceous, club piceous. Head moderately densely 

 scabro-punctate. Thorax a little wider than long, slightly narrowed toward 

 the base, sides very feebly arcuate, at hind angles sinuate, margin moderately 

 prominent and distinctly crenulate, disc depressed scabrous and vaguely punc- 

 tate. Elytra a little longer than wide conjointly, finely striate, intervals with 

 a row of moderately coarse elongate punctures each bearing a semierect hair, 

 surface subgranularly alutaceous. Abdomen acutely margined, alutaceous and 

 sparsely punctate. Prothorax beneath rugulose, body and abdomen sparsely 

 punctate. Length .14 — .16 inch; 3.5 — 4 mm. 



This species differs from all the others in many important par- 

 ticulars, among which the smaller size of the eyes and the pro- 

 longation of the head behind them is worthy of notice, the sinua- 

 tion of the thorax and its crenulated margin occur nowhere 

 else, while the acutely margined abdomen occurs in several foreign 

 species. 



Occurs Texas and Central America. 



C obscurns Erichs. — Elongate, subdepressed, black, opaque, sparsely 

 pubescent, legs testaceous. Antennae testaceous, club piceous. Head finely 

 scabrous, sparsely punctate. Thorax one-third wider than long, slightly nar- 

 rowed in front, sides iu front feebly arcuate, posteriorly nearly straight, 

 margin narrow not crenulate, hind angles obtusely rounded, disc moder- 

 ately convex, surface finely rugulose, sparsely punctate. Elytra nearly 

 square, usually less black than the thorax, surface very finely granular 

 with numerous irregular rows of obsolete punctures. Abdomen moderately 

 shining, finely alutaceous, sparsely punctate. Prothorax beneath rather 

 smooth, shining, body and abdomen sparsely puaotulate. Length .14 — .16 

 inch; 3.5 — 4 mm. 



Occurs from the Middle States to Florida. 



C mexicanus Murr. — Black, subopaque, very sparsely pubescent. Head 

 densely punctate. Thorax rugulose very obsoletely punctate. Elytra finely 

 rugulose with a faint tendency to a linear arrangement. Abdomen above less 

 shining than obscurus and more decidedly punctate, beneath also more punc- 

 tate. Length .16 inch ; 4 mm. 



This species closely resembles obscurus in every way, but the head 

 is more decidedly sculptured and the elytra less so. The legs are 

 entirely black. 



I refer our specimens to this species rather than give it another 

 name as it corresponds very closely with Murray's description, and 

 the species around it are so very closely allied that I prefer not to add 

 a synonym to those which will result from a new study with more 

 material than Murray had. 



Occurs in south-eastern California extending southward into the 

 Peninsula. 



