36 DESCRIPTION OF INSECTS 



Feet deep piceous. 



Closely resembles impuncficolHs, but the stn?e of the elytra; 

 and the hind angles of the thorax are punctured. — The name 

 somaragdulus having l)een appropriated to a very different 

 insect, 1 have substituted that of basillaris. It belongs to the 

 genus Amara of Bonelli. 



3. F. *impnndicolHs oval, blackish-bronzed, beneath black ; 

 thorax im punctured and as broad at base as the elytra ; 

 palpi blackish. 



Length three-tenths of an inch. 



Bodij oval, slightly attenuated behind, blackish-bronzed or 



purplish-black ; antetmce brown, three basal joints rufous ; 



palpi black. 

 Thorax from the middle to the base as broad as the base 



of the elvtra, base impunctured, hind angles acute, dorsal 



and basal lines distinct, margin not depressed. 

 Elytra somewhat narrowed behind, with impunctured stride, 



lateral interstitial line serrate on the inner edge. 

 Feet piceous-black. 



This insect is not uncommon in Pennsylvania; it was 

 also found by Mr. Nuttall on the Missouri. — Corresponds 

 with the cliaracters of the genus Amara of Bonelli. 



4. F. ^angustata oval, blackish-cupreous, beneath black ,• 

 feet rufous; thorax impunctured, as broad as the elytra: 

 palpi rufous. 



Length hardly one-fourth of an inch. 



Bndif oval, above blackish-cu|)reous, beneath black. 



Jintcrvut and palpi pale rufous. 



Thorax from the mid<ile to tlie base as broad as the elytra, 



impunctured. posterior angles acute, margin not depressed, 



d')rsal and basal lines distinct. 

 Eljftra striate, impunctured, uiarginalinterstitial line serrat* 



on the inner edge. 



