AMERICAN rniLOSOrniCAL SOCIETY. 409 



near the seutel, obsolete, interstitial lines depressed, third one 

 with two distant obsolete punctures behind the middle ; wings 

 none ; pectus in some lights slightly tinged with green ; tarsi 

 piceoufl. 



Resembles tartaricus, but is distinguished by the thoracic hind 

 angles being less acute and the elytral striae punctured ; from 

 unicolor it is at once distinguished by the less rounded form of 

 the thorax and its less contracted base; from sti/</icus, to which 

 by form it is more closely allied, it may be readily separated by 

 the punctured striae, &c. 



Found on Mr. II. Haines's fiirm, Germantown. 



It belongs to the genus Pterostichus of BonelH. 



[Afterwards described as F. vidua Dej.; belongs to Ecar- 

 thrus. — Lec] 



14. F. PLACIDA. — Blackish, glabrous ; thorax transversely sub- 

 orbicular, margined ; elytra with acute im])uuetured strije. 



Length seven-twentieths of an inch. 



Carabui peltatus Melsh. Catal. 



Head purple-black slightly tinged witli green ; antennae black- 

 ish, rufous at base; palpi rufous or piceous ; thorax a little nar- 

 rower than the elytra, transversely suborliicular, blackish, slightly 

 tinged with green ; margin depressed, edge a little recurved, parti- 

 cularly at the hind angles, which are not excurved; dorsal line and 

 anterior transverse line impressed, basal lines almost obsolete in 

 the concavity of the lateral base, which is a little rugous; elytra 

 blackish with an obsolete purplish tint; striae not profound, acute, 

 impunctured ; interstitial lines very slightly convex ; [44] pectus 

 and postpectus black ; feet black ; tibiae and tarsi piceous ; abdo- 

 men black. 



[A Plati/inis of the division JycH«?;i, and afterwards described 

 as A. muroKum Dej. — Lec] 



15. F. TARTARICA. — Entirely black, immaculate, glabrous; 

 striae of the elytra impunctured. 



Length three-fourths of an inch. .^ 



Body glabrous, black ; head frontal lines distinct ; antennae, 

 ferruginous hair towards the tips, joints attenuated towards their 

 bases; labrum truncate; thorax large, transverse, gradually a 



1823.] 



\ 



