82 R. W. Dawson 



1910. Blatchley: Coleoptera of Indiana, pp. 924-927. (Descrip- 

 tive notes and table for 9 species). 



One character used in the subjoined table of species proba- 

 bly needs a word of explanation. This is the "accessory 

 spinule," a prolongation of the apical margin of the middle 

 and hind tibiae on the under side adjacent to the spurs. The 

 little spinule is scarcely or not longer than the fimbriae of the 

 apical margin, but is easily distinguished from these by its 

 being distinctly thicker, stronger and not articulated at the 

 base. 



SYNOPSIS OF THE SPECIES 



1. Clypeus subangulate, sometimes denticulate on each side of the 

 median emargination abditus 



Clypeus feebly emarginate, the angles at each side broadly 

 rounded 2 



2. Opaque species; pronotum without basal marginal line; head 

 densely, finely punctured, not rugose; elytral intervals each 

 with a row of fine punctures bearing a small, scale-like, yellow- 

 ish hair imbricatus 



Shining species; pronotum with basal marginal line 3 



3. Hind tibiae without accessory spinule, form slender and 

 elongate gracilis 



Hind tibiae with accessory spinule 4 



4. Intervals of elytra very flat, densely and rather coarsely punc- 

 tured; form short and robust robustus 



Intervals of elytra convex, rarely punctate 5 



5. Clypeus finely punctured, without traces of wrinkles; occiput 

 with coarse punctures; hind femora with a deep marginal line 

 extending two-thirds to the base sty-igafiis 



Clypeus transversely wrinkled or coarsely punctured; hind fe- 

 mora with at most a fine and feeble marginal line near the 

 knee cognatus 



188 



