AMERICAN PHILOSOPHICAL SOCIETY. 468 



marginal interstitial line serrate on the inner edge, margin tinged 

 with green j feet deep piceous. [36] 



Closely resembles ImpuncticolUs, but the striae of the elytrae 

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

 smaragdulus having been appropriated to a very different insect, 

 I have substituted that of hasillaris. It belongs to the genus 

 Amara of Bonelli. 



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



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

 black ; thorax impunctured and as broad at base as the elytra ; 

 palpi blackish. 



Length three-tenths of an inch. 



Body oval, slightly attenuated behind, blackish-bronzed or 

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

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

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

 basal lines distinct, margin not depressed ; elytra somewhat nar- 

 rowed behind with impunctured striae, 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 

 characters 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. 



Body oval, above blackish cupreous, beneath black ; antenna^ 

 and palpi pale rufous ; thorax from the middle to the base as 

 broad as the elytra, impunctured, posterior angles acute, margin 

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

 punctured, marginal interstitial line serrate on the inner edge ; 

 feet rufous. [37] 



Taken by Mr. Nuttall on the Missouri. Resembles hasillarn 

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

 by being impunctured, 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 Hald. — Leo.] 



1823.] 



