AMERICAN PHILOSOPHICAL SOCIETY. 507 



OLISTHOPUS Dejean. 



1. 0. PARMATUS Say, (Feronia) Trans. Amer. Philos. Soc. 

 Dej. Sp. Gen. 3, p. 181. 



2. 0. CINCTUS. — Blackish; edge of the thorax, elytra and feet 

 dull rufous. 



Inhabits Pennsylvania. 



Body blackish ; head impunctured ; antennae dusky, pale rufous 

 at base; palpi piceous ; thorax with the dorsal and anterior lines 

 almost obsolete ; lateral narrow margin obviously rufous ; lateral 

 basal impressions very distinct, suborbicular and sparsely punc- 

 tured : elytra dull reddish brown, with a slight perlaceous re- 

 flection ; striae well indented, impunctured ; interstitial spaces 

 depressed, third space with an impressed puncture beyond the 

 middle ; feet yellowish piceous, posterior pair darker. 



Length less than three-tenths of an inch. 



Much like the j)annatus Say. It is more slender. 



[A specimen was given me by Dr. Melsheimer ; not different 

 from 0. parmatus. — Lec] 



FERONIA Latr. Dej. 



P(ECIlus Bon. 



1. F. CONVEXICOLLIS Say. — Resembles F. dialcitcs Say, but 

 is shorter, the thorax more convex, and the punctures of the third 

 interstitial stria of the elytra are three, of which the terminal one 

 is near the tip. 



Steropus Meg. 



2. F. OBSOLETA. — Blackish-ferruginous ; elytra, striae obsolete 

 each side and at tip. 



Inhabits Indiana. 



Body very dark rufous, polished ; labrum, palpi, mandibles at 

 base, antennae, feet and abdomen honey-yellow ; head impunc- 

 tured ; a slightly raised line over the antennae, inside of which the 

 front is slightly corrugated transversely each side ; thorax with 

 the surface obsoletely corrugated, visible in a particular direc- 

 tion ; dorsal line acute, slightly impressed ; basal lines indented, 

 single, viewed from above orbicular, definitely and rather deeply 

 1834.] 



