AMERICAN OOLEOPTERA. 39 



which it differs by the totally black, coarsely and deeply punctured 

 head. 



Collected by Mr. G. R. Crotch, at San Diego, California. 



C insperatus, n. sp. — Black, moderately shining. Head sparsely and 

 finely punctured. Thorax subquadrate, base slightly narrowed, sides in front 

 arcuate, surface moderately convex, median line feebly impressed, very 

 sparsely punctate. Elytra less shining than thorax, finely scabrous. Body 

 beneath black, very sparsely punctate, sparsely cinereo-pubescent. Legs 

 black, punctate, with black pubescence, middle tibiae slightly arcuate, outer 

 spur of hind tibi« short, very stout, truncate. Length .80— .90 inch; 20—23 

 mm. 



Ifa/e.— Antennae not stouter at middle, as long as half the body. Last dorsal 

 segment truncate. Fifth ventral acutely and deeply notched, sixth deeply 

 cleft anci fimbriate at tip. Hind trochanter with short spine near the tip. 

 Anterior tibiae with two spurs. 



i^ema/e.— Antennae shorter than the male, gradually thicker to tip. Fifth 

 ventral truncate, sixth rounded at tip. Hind trochanter mutic. 



This species is almost intermediate in appearance between melaena 

 and moerens. It belongs to Group II. of my revision (Proc. Am. 

 Phil. Soc. 1873, p. 1U9), by the. form of the antennae, and to the first 

 section of that group by the short, stout, truncate spur of the hind 

 tibia. The male characters will serve to distinguish the species from 

 any other in the group. 



In C. moerens, Lee, the outer spur of the hind tibia is slender and 

 acute and the hind trochanter of the male angulate near the distal 

 end, thus approaching the preceding species. 



Specimens of the above described species were taken by Mr. 

 Crotch, in the Mojave Desert, California. 



XAMTIIOCHROA, Schmidt. 



X. caliroruica, n. sp.— Form slender. Head, thorax, femora and last 

 abdominal segment pale reddish-yellow, body beneath, tibiae and tarsi black, 

 shining, elytra bluish. Front very sparsely punctured, nearly smooth, occiput 

 distinctly punctured. Antennae half the length of body, entirely black. 

 Thorax slightly longer than wide, sides in front arcuate, posteriorly slightly 

 sinuate, disc feebly convex, shining, very indistinctly punctured. Elytra 

 bluish, moderately densely scabro-punctate, sparsely pubescent and with three 

 feebly elevated costiform lines, two discal and one lateral, gradually evanes- 

 cent toward the apex. Body beneath black, shining, very sparsely punctate, 

 dorsal and ventral segments pale rufo-tcstaceous. Femora and base of tibi« 

 pale rufo-testaceous, tibiae and tarsi black. Length .38 inch; 9.5 mm. 



One specimen collected by Mr. G. R. Crotch, in California. 



CORPHYBA, Say. 

 Several new species having been brought by Mr. Crotch, the num- 



