NATURAL SCIENCES OF PHILADELPHIA. 319 



Sides of prothorax more oblique, less rounded. 11. furtivus Lee. 

 b. Elytra strongly sinuate towards the tip : 

 Large, sides of prothorax very much rounded, basal angles longer, more 



prominent, more strongly carinated. 13. Sallei Lee. 



Smaller ; (species very indefinite and opinionative) : 

 Anterior transverse impression well defined ; hind angles longer, pro- 

 minent. 

 Broader, elytral margin stronger, subangulated at the humeri, (elytral 



strife sometimes effaced), latebrosus Lee. 13. subsiriatus Lee. 



Narrower, elytral margin finer, not angulated, (elytral striae sometimes 

 partly effaced), ovipennis Lee. 14. constnctus Say. 



Anterior transverse impression feeble, or obsolete, liind angles shorter, 

 though prominent, legs ferruginous, abclominalis Lee. lixa Lee. 



15. incisus Lee. 

 Anterior transverse impression obsolete, hind angles very small, scarcely 



carinate, outer basal stria punctiform. 16. vinctus Lee. 



C. Prothorax strongly rounded on the sides and narrowed behind, basal 

 fovege single, hind angles not carinate, obtuse or very small, and 

 feebly prominent. 



a. Prosternum feebly or obsoletely sulcate behind : 



* Anterior transverse impression feeble : 

 Elytra tolerably strongly sinuate towards the tip : 

 Large, hind angles small, nearly rectangular. 17. unieolor Say. 



Large, hind angles small obtuse. 18. rotundatus Lee, 



Middle sized, hind angles small obtuse ; Brevoorti Lee. 



19. spoliaius Newm.' 

 Smaller ; elytra less sinuate towards the tip : 

 Hind angles small, prominent, rectangular, ovuhim Chaud. 



20. acutus Leo. 

 Hind angles obtuse and rounded, basal fovese small : 



Basal seta of prothorax in front of angle, elytra striate. 



21. obsolet'us Say. 

 Basal seta of prothorax at the angle as usual ; elytra nearly smooth. 



22. Icevipemiis Leo. 

 ** Anterior transverse impression a finely impressed line near the 

 front margin. 23. approximatus Lee. 



b. Prosternum more deeply sulcate behind ; hind angles of prothorax 



obtuse, not prominent : 

 * Anterior transverse impression a deep line, further from the front 

 margin than in the preceding : 

 Elytra smooth, or very obsoletely striate. 24. morio Dej, 



** Anterior transverse impression not impressed : 

 Elytra with punctured striae, fainter behind, but not obliterated ; tenebrosa 

 Dej. 25. faber Germ. 



' This name seems to belong more properly to this species than to E. 

 faber., to which I formerly referred as a synonym. 



