AMERICAN COLEOPTERA. 107 



arcuate, apical and basal angles obtuse, apex emarginate, base bisinuate, disc 

 moderately convex, margin explanate, surface very sparsely finely punctured 

 at middle, at sides coarsely and moderately densely. Elytra a little wider 

 than the thorax, oblong, nearly parallel, disc vaguely tricostate, surface 

 coarsely but not densely punctured. Body beneath moderately densely punc- 

 tate. Length .16 — .18 inch; 4 — 4.5 mm. 



The anteuufe are pieeous the three basal joints pale. The elytral 

 punctures have a deceptive appearance of being transversely con- 

 fluent, those at tip are however always finer and much less dense. 

 Specimens occur with the body beneath and thorax pieeous, another 

 in Dr. Leconte's cabinet is black with the thorax red, and others are 

 entirely pale luteous. 



Occurs from Oregon to California. 



C exigniis n. sp. — Oblong oval, pieeous, thorax sometimes rufous, surface 

 sparsely pubescent. Head nearly smooth. Antennse as long as half the body, 

 joints 2 — 3 small, together equal to the fourth, the third as long as but more 

 slender than the second. Thorax nearly three times as wide as long, scarcely 

 narrowed in front, sides very feebly arcuate, margin not explanate, aj)ex trunc- 

 ate, base feebly bisinuate, surface finely and sparsely punctate. Elytra a little 

 wider than the thorax, oblong, parallel, rather finely not densely punctate. 

 Body beneath finely sparsely punctate. Length .12 inch; 3 mm. 



Resembles ruficollis but is smaller, the sides of the thorax not ex- 

 planate and the two joints of the antennae above noted longer. 



Occurs in the Mariposa region of California. 



C. COnclnnus Lee. — Oblong oval, black, elytra with large discal, sub- 

 basal red space, moderately shining, sparsely finely pubescent. Head verj 

 sparsely, rather finely punctate. AntenniB half as long as the body, black, 

 three basal joints paler, joints 2 — 3 small, equal in length, third a little more 

 slender, the two together a little shorter than the fourth. Thorax nearly 

 three times as wide as long, apex slightly emarginate, sides feebly arcuate, 

 anterior angles distinct, side margin gradually declivous, not explanate nor 

 reflexed, surface sparsely punctate. Elytra wider at middle than the thorax, 

 moderately densely punctate, and very vaguely costate. Sides of metasternum 

 and first three abdominal segments coarsely but sparsely punctured, last 

 two segments very finely and sparsely punctured. Length .14 — .16 inch ; 

 3.5 — 4 mm. 



An easily known species by its coloration, but specimens sometimes 

 occur entirely testaceous. 



Occurs near San Francisco, California, and western Nevada. 



C. obscurns Guer. — Ovate, moderately convex, sparsely pubescent, black, 

 shining, antennae and legs usually entirely pale. Head smooth. Antennae pale 

 yellow with the terminal joints sometimes darker, structure as in concinmis. 

 Thorax as in concinnus, surface sparsely punctulate. Elytra not densely 

 punctate, surface very vaguely tricostate. Sides of metathorax and abdomen 

 moderately coarsely, not very densely punctate, last ventral segment smoother. 

 Length .12 — .14 inch; 3 — 3.5 mm. 



