56 DESCRIPTION OF INSECTS 



narrowed behind" is not suflRciently obvious in our insect. 

 Win^s perfect. 



The name Pacilia designates a genus in ictliyology. 



37. F, ^chalcites green, polished, beneath black ; feet black ; 



head and thorax impunctured, margin of the thorax not 



depressed. 

 Length half an inch. 



Carabus chalcites. 'Melsh. Catal. 



Body glabrous, green, polished, beneath black. 



Head impunctured ; antennm brown, rufous at base, third 

 joint with a l)lackish carina ; labrwn black ; palpi piceous. 



Thorax impunctured, not contracted l>ehiiid, dorsal line dis- 

 tinct, base as broad as the elytra, basal lines two each side, 

 margin not depressed, basal angles rectangular, acute. 



Scutel green or cupreous. 



Elytra polished, green, slightly tinted with cupreous, margin 

 opake, interstitial lines convex, impunctured, strise within 

 black and with indented lines each side. 



Feet black ; tibia and tarsi deep piceous. 



Common. Brought also from the Missouri by Mr. Nuttall. 



This species belongs to the a;enus Poecillus of Bonelli. It 

 seems to resemble the Harpalus viridi-eeneus of Palisot, but 

 the thorax is less contracted at base, has four basal lines, and 

 the feet are blackish. 



38. F. *caudicalis winged ; black ; joints of the antennfe at- 

 tenuated at their bases; thorax witii the exterior edge ex- 

 curved at base ; elytra with slightly punctured strise. 



Length less than half an inch. 



Body black, glabrous, polished. 



Antemioi and palpi piceous. 



Thorax contracted behind, lateral edge excurved near the 



