INHABITING NORTH AMERICA. 61 



jfrom the Missouri, by Mr. Nuttall, which varies ia being en- 

 tirely green above. 



Genus Chijenius. Bonel. Latr. 



Anterior tibia emars;inate ; two anterior tarsi dilated in the 

 male and funiisiicd beneath witli dense, granuliforni pa- 

 pilhe ; antennae tiliform, joints elongated j labrum entire; 

 palpi filiform. 



Species. 



i. C. sericeus green, beneath black; antcnnjc and feet pale 



rufous ; head punctin-ed. 

 Length about three-fifths of an inch. 



Carabus sericetm alatus, ater, capite, thorace, et elytris viridi-nitcntibus, aii- 

 tennis pedibusque rufis. Forst. Nov. Sp. Ins, Cent. Oliv. Encyc. Meth. 



Carabus Fosleri. Turt. Linn. II., p. 464. 



Carabus sericeus. Melsh. Catal. 



Body green, bencatli black, with very sliort numerous hairs. 



Head polislied, punctured ; ontruna', and jxilpi pale iid'ous, 

 the former paler at base ; labrum rufous ; mandildes ferru- 

 ginous at base. 



Thorax distinctly transverse, densely punctured, polished, 

 dilated in the middle, posterior lateral edge rectilinear or 

 slightly excurved, dorsal and basal lines very distinct, base 

 rather narrower than the elytra. 



Elytra not wider behind the middle, with numerous minute 

 punctures, striate, stria' acute, minutely punctured, intcr- 

 sfitial lines flat. 



Feet rufous ; pectus and postpcctus punctiued ; abdomen with 

 minute punctures. 



Var. a. Elytra purplish. 

 Very closely resembles the next, but difTcrs in the less 



elongated forni of the thorax. Common in the middle states, 



and was brouglit from the Missouri by Mr. Nuttall. 



