AMERICAN PniLOSOPUICAL SOCIETY. 463 



marginal interstitial line serrate on the inner edge, margin tinged 

 with green ; feet deep piccous. [36] 



Closely resembles imj)uncticuUis, but the striaj of the elytrae 

 and tlie hind angles of the thorax* arc punctured. The name 

 »mar(vj(hduA having been appropriated to a very different insect, 

 I have substituted that of basillaris. It belongs to the genu« 

 Amara of Bonelli. 



[Afterwards described by Dejean as Amara lucidula. — Lec] 



3. F. IMPUNCTICOLLTS. — Oval, blackish-bronzed, beneath 

 black ; thorax impuncturcd and as broad at base as the elytra j 

 palpi blackish. 



Length three-tenths of an inch. 



JJody oval, slightly attenuated behind, blackish-bronzed ur 

 purplish black; antennae brown, three basal joints rufous ; palpi 

 black ; thorax from the middle to the base as broad as the base 

 of the elytra, base impuncturcd, hind angles acute, dorsal and 

 basal lines distinct, margin n(>t depressed ; elytra somewhat nar- 

 rowed behind with impuncturcd stria?, lateral interstitial line 

 serrate on the inner edge ; feet piccous black. 



This insect is not uncommon in Pennsylvania ; it was also 

 found by Mr. Nuttall on the Missouri. Corresponds with the 

 characters of the genus Amara of Bonelli. 



4. F. AN(!USTATA. — Oval, blackish cupreous, beneath black ; 

 feet rufous ; thorax impuncturcd, as broad as the elytra ; palpi 

 rufous. 



Lcngtli hardly one-fourth of an inch. 



Body oval, above blackish cupreous, beneath black ; antenn.T 

 .^nd palpi pale rufous ; thorax from the middle to the base as 

 broad ;us the elytra, impuncturcd, posterior angles acute, margin 

 not depressed, dorsal and basal lines distinct; elytra striate, im- 

 puncturcd, marginal interstitial line serrate on the inner edge ; 

 feet rufous. [37] 



Taken by Mr. Nuttall on the Missouri. Resembles hasillarif 

 and impuncticoUis, but is much smaller, and differs from the first 

 by being impuncturcd, and from the last by the color of the an- 

 tennae, palpi, feet, &c. Belongs to the genus Amara of Bonelli. 



[Afterwards described as A. indistincta Ifald. — Lec] 



1823.] 



