AMERICAN PHILOSOPHICAL SOCIETY. 561 



are sometimes almost imperceptible. Perliaps a Notaphus of 

 Meg. 



7. B. TETRACOLUM Say, Trans. Amer. Philos. Soc.— Allied 

 most closely to Peryphus rupestris Illig., than which it is some- 

 what larger. 



8. B. POSTREMUM. — Blackish ; elytra brownish, obscure yel- 

 lowish at tip. 



Inhabits Pennsylvania. 



Head greenish-black ; face with an indented line each side, 

 between which and the eye is a large orbicular puncture ; an- 

 tenna fuscous, piceous at base; palpi dark honey-yellow; mandibles 

 at base piceous; thorax bronze black, very obscurely piceous on 

 the middle of the anterior margin ; contracted behind ; posterior 

 angles obtuse angular; dorsal line impressed; anterior transverse 

 very obvious, arquated ; basal line dilated, suborbicular ; basal 

 margin with slight inequalities or punctures between the basal 

 lines ; a slightly elevated line on the lateral margin, forming a 

 groove with the slightly elevated edge, more obvious near the 

 angle, and becoming obsolete before ; elytra very dark honey -yel- 

 low or brownish, much paler at tip ; striae somewhat dilated, and 

 with dilated, quadrate, profound punctures ; striae more slightly 

 impressed towards the tip, and the punctures obsolete; third in- 

 terstitial space a little broader than the others, with a puncture 

 before the middle and another equidistant behind the middle, 

 both nearer the third stria ; wings perfect ; beneath black ; abdo- 

 men tinged with piceous; feet pale yellowish. 



Length one-fifth of an inch. 



Resembles tetracolum Say, but the elytral striae are more di- 

 lated, the punctures of the third interstitial space are more an- 

 terior, and the posterior pale spot of the elytra is quite terminal. 

 Belongs to the genus Peri/jihus Meg. 



[Afterwards described as Peryphus scopuUnus Kirby. — Lec] 



9. B. NIGRUM Say, Trans. Amer. Philos. Soc— The striae are 

 so much dilated that no punctures are visible on the third inter- 

 stitial space. 



10. B. SIGILLARE.— Cupreous ; elytra with two dilated, sub- 

 quadrate green spots on each ; fourth stria rectilinear. 



Inhabits Missouri. [438] 



1834.] 



