480 TRANSACTIONS OF THE 



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

 blackish. 



[Afterwards named P. Saijl by Brulle, in consequence of 

 Germar also describing a Poecilus chalcifcs, but the name of Say 

 antedates the latter by two. years, as will be seen by the note on 

 p. 435.— Lec] 



38. F. CAUDiCALis. — Winged; black; joints of the antennae 

 attenuated at their bases; thorax with the exterior edge excurved 

 at base ; elytra with slightly punctured strise. 



Length less than half an inch. 



Body black, glabrous, polished ; antennae and palpi piceous ; 

 thorax contracted behind, lateral edge excurved near the [57] 

 basal angles, dorsal line very distinct, continued to the base with 

 a much shorter one at the lateral angles, space of the basal an- 

 gles depressed and punctured, basal lines distinct, not attaining 

 the basal edge ; elytra, strise impressed, slightly punctured, in- 

 terstitial lines convex ; pectus and postpectus each side punctur- 

 ed ; feet dark piceous. 



Somewhat allied to F. adoxa, but is winged, the antennae are 

 far less robust, the thorax is smaller, punctured at the basal 

 angles, and slightly punctured in the striae of the elytra. 



[Afterwards described as Oynasens nigrita Kirby; I consider 

 Fcronia luctuosa Dej., as the same, but Baron Chaudair informs 

 me that he refers that name to the species described by me as 

 Fterostichus abjectiis. Dr. Harris kindly communicated to me 

 specimens of the present species which have been compared with 

 Say's type. — Lec] 



39. F. INTERSTITIALIS. — Rufous ; elytra brownish, punctured, 

 with iridescent reflections ; posterior thoracic angles rounded. 



Length full seven-twentieths of an inch. 



Head rufous, black at tip ; thorax rufous, transverse, quadrate, 

 widest in the middle, edge curving equally, base depressed each 

 side and with numerous punctures, anterior margin punctured, 

 and a few remote punctures on the disk, dorsal line impressed, 

 posterior angles obtusely rounded ; elytra blackish-brown with 

 iridescent reflections, striae profound, interstitial lines convex, 

 conspicuously and densely punctured, edge rufous; pectus pale 

 rufous ; feet rufo-testaceous ; postpectus black ; venter rufous. 



[Vol. II. 



