66 DESCRIPTION OP INSECTS 



Feet pale, joints somewhat darker ; tail pale. 



Differs from all the preceding ones in having the lines in- 

 tervening between the strife convex. It was taken on the 

 Missouri by Mr. Nuttall. 



10. C. * Peiinsylvimicus green, polished, beneath piceous ; 

 elytra blackish; feet rufous; head impunctured; intersti- 

 tial lines of the elytra somewhat convex. 



Length not quite lialf an inch. 



Carabus Pennsylvanicus. Melsh. Catal. 



Body green, polished ; elytra dark purplish, with an obscure 



greenish margin ; beneath deep piceous. 

 Head impunctured ; antennae brown rufous at base ; labrum 



ferruginous, slightly emaiginate. 

 Thorax dilated in the nnddle, punctured, somewhat con- 

 tracted behind, edge slightly excurved near the base. 

 Elytra with numerous minute punctures, strife with approxi- 

 mate punctures which are obsolete towards the tip, inter- 

 stitial lines convex. 

 Feet rufous. 



Resembles nemoraHs, but is known by the convex inter- 

 stitial lines and less profoundly emarginated labrum. 

 Not common. 



Genus Dicjelus*. Bonel. Latr. 



Anterior tibia emarginate ; two anterior tarsi dilated in the 

 male and furnished beneath with dense, granuliform pa- 

 pillae ; antennse filiform ; labrum profoundly emarginate. 



* Since the prefatory observations to this essay were printed, I have had the 

 good fortune to find, in the library of this Society, the fifth volume of the Class 

 of Physical and Mathematical Sciences of the Memoirs of the Imperial Aca- 

 demy of Turin. This volume is particularly interesting to me at this time, 

 as it contains a portion of the essay on the Linnsean Carabii by M. Bonelli, 

 entitled " Observations entomologiques". From this essay 1 have made a few 

 quotations in this genus. 



