AMERICAN PHILOSOPHICAL SOCIETY. 503 



A.pproaches the preceding, but, color apart, it may be known 

 by the thorax being more contracted behind. 

 [Also a Tachys. — Leg.] 



12. B. L.EVUM. — Piceous; palpi whitish; elytra destitute of 

 striae . 



Length one-twentieth of an inch. . 



Body piceous tinctured with rufous; head rather darker; an- 

 tennae paler at base; palpi whitish; thorax transversely sub- 

 quadrate, broadest before the middle, hardly narrowed behind, 

 lateral edge not excurved behind, posterior angles slightly obtuse, 

 angular, basal edge nearly rectilinear, dorsal line obsolete, basal 

 ones wanting ; elytra impunctured, destitute of striae, except- 

 ing an obsolete sutural one ; feet testaceous. 



I arrange this species with Bemhidium from the habit, the 

 palpi in the specimen I possess being mutilated. [89] 



[A Tachi/s afterwards described as B. iroglodi/fes Dej. — Lec] 



13. B. VARIEGATUM. — Black; head and thorax tinged with 

 greenish ; elytra varied with testaceous ; feet pale piceous. 



Length one-fifth of an inch. 



Body impunctured, glabrous, beneath black; head black 

 slightly bronzed ; antennas and palpi fuscous, base piceous ; tho- 

 rax blackish slightly bronzed, tinged each side with green, 

 broadest in the middle, a little contracted behind, lateral edge a 

 little excurved near the base, posterior angles rectangular, dorsal 

 and basal lines distinct, an elevated acute line at the posterior 

 angles; elytra black variegated with testaceous, or testaceous 

 varied with black dots and lines, and with a slight cupreous 

 tinge, striae punctured, profound, interstitial lines convex, third 

 one with two distant punctures. 



Very closely allied to B. dorsalis, which may be a mere variety 

 of this insect. This species is subject to great variety in its 

 elytral markings, the chief color of the elytra being sometimes 

 black and sometimes pale testaceous, with a greater or less 

 number of lines and spots. 



14. B. TETRACOLUM.— Greenish-black ; feet rufous; elytra 

 each with two rufous spots. 



Length nearly one-fourth of an inch. 

 1823.] 



