3S0 REVISION OF THE TENEBRIONIDJE OF AHERII \. 



II. viridipennis, Fab* Diaperis Syst. El. II, 586, I; < tst et P.oill.'. Oplocephala Anu. d. Sc. Nat. 23, 340. 



Iii thi> species and the following, the head of the female is entirelj devoid ol tubercles. 

 L< ugth .10— .1 I inch. 



II. bicornis, Oliv., Diaperis Km. :!. -V>: Enc. Metb. 6, 273; Kirby, Arrbenoplita Fauna Bor. Am. 233; 

 1 t. el Brullr, Boplocepbala p. 341; bicornis, Fab., Bispa Mant. p. 215. 



This species differs from the preceding in having the whole surface bluish green. The 

 thorax occasionally becomes brownish. 



Length .10-.14 inch. 



This and the preceding species arc found rather abundantly over our entire country, 

 living in fungi. 



II. cbalybea, Cast, el Brulle, Ann. Sc. Nat. 23, p. 341. 



" Elongate, punctured, shining, bluish green ; head of male with two vertical horns, 

 female tuberculate ; elytra moderately striate ; bod) beneath blackish ; legs brownish. 

 Length 1 lines, width 1 j lines, 

 from the neighborhood ol' Philadelphia." 

 Unknown t<> us. Probably not North American. 



II. collaris, Cast, el Brulle, loc. oit. p. 347. 



"Elongate, punctured, shining, dark ferruginous; head at middle bituberculate, mouth 

 antenna? brownish; thorax reddish brown, scutellum red; elytra faintly striate, black; 

 with the base, humeri and anterior portion of suture brownish; legs pale ferruginous. 

 Length '-H lines, width 1[ lines. 

 From the neighborhood ol' Philadelphia." 

 Unknown to us. 



PLATYDEMA, Cast, et BrulU. 

 Platydema, Cast, el Brulle, Ann. Sc. Nat. 23, p. 



Firsl joint ol' hind tarsi longer than the two following joints; epipleurae entire; me- 

 sosternum concave; last joint of maxillarj palpi broadly triangular, with the inner and 

 outer sides nearly equal; intercoxal process of abdomen triangular, acute. 



These characters will serve to distinguish this genus from all those before mentioned 

 and those which follow. 



Our species are numerous and may be distinguished by the following table: 



Head tuberculate or horned ; front concave. 

 Polished or shining sp< cies. 



Black, broadly oval. e \ ca \ a t u in . 



Blue, more elongate. c j a n e scens. 



Opaque species. c ryt h roc e in m . 



