AMERICAN PHILOSOPHICAL SOCIETY. ^$7 



verse, extending upon tlie 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 Percus 

 of Bonelli. 



(^Belongs to Patrobus, and afterwards described as P. america- 

 nus Dej. — Leg.] 



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

 tennae [41] brownish; tarsi piceous; strise of the elytra punc- 

 tured. 



Length seven-tenths of an inch. 



Body glabrous, black, impunctured ; head, antennae brownish 

 towards the tips, joints attenuated towards the bases; labrum 

 truncate ; palpi piceous ; thorax transverse, contracted behind 

 rather abruptly, tip of the posterior angles obtusely rounded, 

 sublobate ; 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 strife near the suturte, obsolete marginal interstitial line 

 serrate with ocellate punctures, third Hue with a single puncture 

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



This species is referable to the genus Pterosticlius of Bonelli. 



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

 under the generic name Evarthrus. — Leg.] 



11. F. STYGiCA. — -Apterous, black, glabrous, impunctured ; 

 striae impunctured ; basal thoracic lines dilated. 



Length more than three-fifths of an inch. 



Carabus stygiais Melsh. Catal. 



Body black, impunctured, glabrous; antennae rather surpassing 

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

 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 puncture 

 1823.] 



