1853.] 281 
strongly dilated; the middle tarsi are not dilated. The sutural stria of the 
elytra is deeper than the others. é 
2.C. simplex, piceus, fulvo-sericeus, dense punctulatus, thorace antrorsum 
subangustato, lateribus rotundatis, basi late rotundato, elytris obsoletissime 
striatis, stria suturali profundiore, antennis basi testaceis; tibiis calearibus me- 
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 antenne are as long as the head and thorax, moderately 
thickened, the 7th 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 profunde, antennis 
thorace brevioribus magis clavatis. Long. °11. 
One female, New York. This species is readily distinguished from the pre- 
ceding by the shorter, more clavate antenne, 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 tibie are somewhat smaller than in the preceding species. 
B. Thorax angulis posticis rectis vel acutis. 
4. C. californicus, oblongus, subovalis, piceus, sericeus, subtilissime 
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 antenne 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 strie 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 tibie. 
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-rufus, sericeus, dis- 
tinctius strigosus, thorace latitudine sesqui breviore, antrorsum modice angus- 
tato, angulis posticis vix productis, elytris stria suturali profunda, antennis 
magis incrassatis piceis basi testaceis. Long. -11. 
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 antenne 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. °12. 
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- 
tenne 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 pos- 
