132 ACADEMY OF NATURAL SCIENCES 



2. C. HISTEROIDES. — Dark cupreous; clypeus emarginate ; an- 

 tennae yellowish. 



Inhabits the United States. 

 ScarhecKS Jmferoides Knoch in !Melsh. Catal. 

 Body punctured ; above dark cupreous ; beneath blackish-cu- 

 preous : clypeus with the punctures ob.solete behind, and more 

 distinct before; an impressed line from the anterior canthus of 

 the eye to the lateral edge; anterior edge bidentate, teeth 

 slightly elevated and separated by an emargination : antennae 

 yellow: thorax with an abbreviated impressed line from the 

 middle nearly to the base, nearly obsolete on the disk and [206] 

 anteriorly ; lateral submargin with an impressed dot ; lateral 

 edge not angulated; elytra striate; striae profound, slightly punc- 

 tured ; interstitial lines flat and impunctured ; anterior tibia 

 with series of yellowish cilae; exterior edge four-toothed, the 

 posterior tooth minute or obsolete ; terminal spine acute. 



Length more than one-fourth of an inch. 



This insect, which occurs in Pennsylvania, I also obtained on 

 the Mississippi near Cape Gerardeau. 



[Belongs to Choeridtum and is the same as Ateuchus capistra- 

 tns Fab. — Leg.] 



3. C. TRIANGULARIS. — Cupreous ; head horned; thorax angu- 

 lated ; elytra striated and punctured. 



Inhabits Arkansa. 



Body dark reddish-cupreous : clypeus reticulate, margined with 

 black ; horn as long as the thorax, recui'ved, black : thorax 

 minutely scabrous, with a depressed triangular plane upon the 

 surface ; the lateral angles very prominent ; a large submarginal 

 lateral puncture : elytra regularly striate, with impressed slightly 

 punctured lines ; interstitial spaces punctured. 



Length less than four-fifths of an inch. 



This species is somewhat larger than C. cami/ex, to which it 

 is closely allied, but differs in color, in having an impressed striae 

 upon the elytra, and punctured interstitial spaces; whereas in ca7'- 

 nt/ex the sides of thorax and the elytra are green, and the latter 

 have elevated striae, and irregular elevated abbreviated lines on 

 the interstitial spaces. 



[A species of Phanaeus ; a variety of it was afterwards de- 

 scribed by me as P. torrens. — Lec] [207] 



[Vol. III. 



