1853.] 281 



strongly dilated ; the middle tarsi are not dilated. The sutural stria of the 

 elytra is deeper than the others. 



2. C. simplex, piceus, fulvo-sericeus, dense punctulatus, thorace antrorsum 

 subangustato, lateribus rotundatis, basi late rotundato, elytris obsoletissime 

 striatis, stria suturali profiindiore, antennis basi testaceis; tibiis calcaribus rne- 

 diocribus armatis. Long. -14. 



? Say, Journ. Acad. Nat. Sc. 5, 184. 



New York. I am not positively certain that this is Say's species, which was 

 found in Arkansas. The thorax is more narrowed in front than described by 

 him; although the legs are in reality black, the lustre of the fulvous hair is 

 such, that one might readily be tempted to describe them as testaceous at base. 



The anterior tarsi and first joint of the middle tarsi of the male are moder- 

 ately dilated ; the antennae are as long as the head and thorax, moderately 

 thickened, the 7ih joint is a little larger than the 6th and equal to the 9th ; the 

 8th is about one half smaller. 



3. C. clavicornis, oblongo-ovatus, ater, subtiliter pubescens, dense punc- 

 tulatus, thorace antrorsum valde angustato, lateribus rotundatis, basi late rotun- 

 dato, elytris versus apicem obsolete striatis, stria suturali profundae, antennis 

 thorace brevioribus magis clavatis. Long. !!. 



One female, New York. This species is readily distinguished from the pre- 

 ceding by the shorter, more clavate antennae, which are only indistinctly testa- 

 ceous at base ;' the 7th joint is about twice as large as the 6th ; the 8th is 

 smaller than the 6th, and appears only about one third as large as its neighbors. 

 The spurs of the tibiae are somewhat smaller than in the preceding species. 



B. Thorax angulis posticis rectis vel acutis. 



4. C. c a li for ni c us, oblongus, subovalis, piceus, sericeus, subtiiissinne 

 punctulatus et transversim strigosus, antennarum basi, pedibus, elytrisque pal- 

 lidoribus, his stria suturali profunda, thorace antrorsum valde angustato, angu- 

 lis posticis paulo productis. Long. 12. 



Abundant at San Jose and San Diego, California. The antennae are slightly, 

 clavate, and as long as the head and thorax. The thorax is strongly narrowed 

 in front, truncate at base, and slightly sinuate near the posterior angles, which 

 are subacute ; the sides are broadly rounded ; the disc is sometimes blackish, 

 and the sides dark rufous. The punctures of the upper surface in this species 

 are very indistinct, and the transverse striae very fine ; the pubescence is seri- 

 ceous, but not dense. The anterior tarsi of the male are strongly dilated, the 

 intermediate pair simple, the posterior pair longer than the tibiae. 



One female from San Diego appears more elongated than the others, and 

 much more narrowed posteriorly ; I cannot, however, find any other difference. 



5. C. strigosus, oblongo-ovalis, subelongatus, piceo-rtifus, sericeus, dis- 

 tinctius strigosus, thorace latitudine sesqui breviore, antrorsum modice angtis- 

 tato, angulis posticis vix productis, elytris stria suturali profunda, antennis 

 magis incrassatis piceis basi testaceis. Long. 'll. 



One female, South Carolina, Dr. Zimmerman. This species resembles the 

 preceding, but the thorax is less narrowed in front, and less rounded on the 

 sides; the transverse lines on the thorax and elytra are more distinct; the 

 punctures are very indistinct ; the first four or five joints of the antennae are 

 testaceous, the rest are piceous, the apex is indistinctly paler. 



6. C. consobrinus, oblongo-ovalis, subelongatus, ater, subsericeus, vix 

 punctulatus, subtiliter transversim strigosus, antennis basi rufo-piceis, elytris 

 stria suturali profunda, thorace antrorsum modice angustato, angulis posticis 

 leviter productis. Long. "IQ. 



Georgia. This species resembles the two preceding, but is a little more 

 elongated, and more oval ; it is entirely black, excepting the base of the an- 

 tennae and the tarsi, which are rufo-piceous. The thorax is more than one half 

 wider than long, moderately narrowed in front, broadly truncate at apex, very 

 slightly rounded on the sides, truncate at base and faintly sinuate at the posr 



