INHABITING xNORi'H AMERICA. 5?" 



basal angles, dorsal line very distinct, continued tu the 

 base with a much shorter one at tlic lateral angles, space 

 of tlie basal angles depressed and punctured, basal lines 

 distinct, not attaining the basal edge. 



Eliffra, strity impiessed, slightly punctured, interstitial lines 

 convex. 



Pectus and posfpectus each side punctured ifeet dark piceous. 

 Somewhat allied to F. adoxus, but is winged, the antcnnse 



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



basal angles, and slightly punctured in the stria* of the elytra. 



39. F. *interstitinlis rufous; elytra brownish, punctured, 

 with iridescent reflections; posterior thoracic angles 

 rounded. 



length full seven-twentieths of an inch. 



Head rufous ; mandibles black at tip. 



Thorax rufous, transverse, quadrate, widest in the middle, 

 edge curving equally, base depressed each side and witli 

 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, stria* pro- 

 found, interstitial lines convex, conspicuously and densely 

 punctured, edge rufous. 



Pectus pale rufous; feet rufo-testaceous ; postpectus black. 



Venter rufous. 

 It was brought from Missouri by Mr. Nuttall, and is very 



rare in Pennsylvania. 



40. F. *obsoleta totally deep black, immaculate, impunc- 

 tured, glabrous. 



Length one-fourth of an inch. 

 Body black, glabrous, impunctured 

 Antennae at base deep blackish-piceous. 

 Thorax narrower than the elytra, rounded rather wider bc- 

 voii. n. — H 



