AMERICAN PHILOSOPHICAL SOCIETY. 467 



verse, exteading upon the sides of the striae, sixth and seventh 

 striae obsolete ; feet testaceous. 



This species is not of frequent occurrence ; inhabits moist 

 places under stones. It appears to belong to the genus Percut 

 of Bonolli. 



[[Belongs to Patrolits, and afterwards described as P. amcrica- 

 tius Dcj. — Lec] 



10. F. UNICOLOR. — Apterous, glabrous, black ; tips of the an- 

 tenna! [41] brownish; tarsi piccous; striae of the elytra punc- 

 tured. 



Ijength seven-tenths of an inch. 



Body glabrous, black, impuncturcd ; head, antenna) brownish 

 towards the tips, joints attenuated towards the bases; labruiu 

 truncate ; palpi piceous ; thorax transverse, contracted behind 

 rather abruptly, tip of the posterior angles obtusely rounded, 

 sublobat-e ; dorsal line not attaining the base, basal lines indented, 

 excurved to the angles, anterior transverse line obsolete or want- 

 ing, lateral edge much rounded, abruptly excurved behind ; elytra 

 convex, striae not deeply impressed, punctures longitudinal, ab- 

 breviated stria) near the suture, obsolete marginal interstitial line 

 serrate with ocellate punctuns. third line with a single puncture 

 near the middle ; feet black ; tibia at tip and tarsi dark piceous. 



This species is referable to the genus Plerostichus of Bonelli. 



[I have separated the species having a single dorsal puncture, 

 under the generic name -Evarthrus. — Lec] 



11. F. STYOlCA. — Apterous, black, glabrous, impunctured ; 

 f*triae impunctured ; ba-;al thoracic lines dilated. 



Length more than three-fifths of an inch. 



Carabus sli/ffinis Melsh. Catal. 



Body black, impunctured, glabrou.^ ; antenna) rather surpassing 

 the base of the thorax, brownish towards the tips, the jointe 

 attenuated towards their bases ; palpi rufous ; thorax, diameters 

 subequal, gradually a little contracted behind, edge not excurved 

 at the hind angles, hind angles not prominent, rounded, basal 

 lines double, dilated, orbicular, and scabrous, base wider than the 

 petiole; elytra slightly tinged with brown, striae indented, im- 

 punctured, interstitial line convex, third with a single punctur<» 

 1823.] 



