AMERICAN PHILOSOPHICAL SOCIETY. 497 



than the petiole; elytra equally punctured with about twenty 

 large, dilated, orbicular, impressed, purplish spots, and two or 

 three equidistant, elevated, elongate, subquadrate, impunctured, 

 bronzed spots each side near the suture, the anterior one 

 largest, a few obsolete elevated lines ; postpectus green, tinged 

 each side with cupreous ; feet green ; femora and tibi« piceous 

 at base ; venter green, disk impunctured, segments brassy at 

 tip. 



[Afterwards named E. ruscarius Say, infra. — Lee] 



NOTIOPHTLUS Dumeril. 

 Antennje not longer than the head and thorax, rather more 

 robust towards the tip ; external maxillary and labial palpi with 

 the terminal joint subcylindric, large, and longer than the pre- 

 ceding joint; labium profoundly emarginate ; maxiljje hardly 

 ciliated on their external side ; thorax depressed, transverse sub- 

 quadrate ; anterior tibia emarginate on their inner side. 



N. SEMISTRIATUS. — Brownish bronze ; front corrugated ; elytra 

 with punctured striae and a longitudinal equal space near the 

 suture. 



Length rather more than one-fifth of an inch. [82] 



Elaphrus semistriatus Melsh. Catal. 



Body brownish bronze, glabrous, immaculate, beneath blackish • 

 head with six or eight frontal, longitudinal, elevated lines, abbre- 

 viated on the vertex ; nasus with several elevated lines at tip 

 and a transverse interrupted one at base ; labrum, a single im- 

 pressed, longitudinal line ; antennae and palpi deep fuscous, paler 

 at base ; thorax as broad as the elytra, transverse quadrate 

 broadest before the middle, slightly contracted to the base, punc- 

 tures numerous, approximated, obsolete each side of the disk 

 dorsal line impressed, punctured, basal lines indented, lateral 

 edge slightly curved, posterior angles rectangular ; scutel rounded 

 at tip, impunctured ; elytra, striae obtuse with large punctures, 

 interstitial lines hardly wider than the striae, a dilated, smooth, 

 polished, longitudinal, continued space separated from the suture 

 by a series of impressed rounded punctures ; pectus punctured ; 

 postpectus with a few punctures each side ; feet black. 



Var. o. Dark green; tibise piceous. 

 1823.] 32 



