Coleopterological Notices, V. 383 



Antennae moderately incrassate ; joints seven to ten equal, eleventh small, 

 not as long as the two preceding ; basal joint slender, strongly constricted 



near the apex ftiscipennis 



Antennae more incrassate ; joints seven to ten increasing in width, the 

 eleventh large, as long as the two preceding ; basal joint stouter, cylin- 

 drical, not constricted nimillS 



Sides of the prothorax without trace of sinuation before the basal angles, the 

 latter obtuse but generally not rounded, not at all prominent. 

 Terapora more prominent than the eyes ; posterior tarsi long, fully two- 

 thirds as long as the tibiae montailllS 



Tempora not more prominent than the eyes ; posterior tarsi scarcely more 



than one-half as long as the tibiae inveniistlis 



8 — Pronotal sulci very feeble peiliisylvanicus 



9 — Vertex not at all impressed ; upper surface smooth and even. 



in colli in is 

 lO — Sides of the prothorax more or less distinctly crenulate ; antennae rather 

 long and slender. 

 Front flattened and strongly, densely granulose and opaque between the 



antennal prominences; eyes moderate in size rilgOSllS 



Front finely, sparsely punctate and polished ; eyes very small niger 



Sides of the prothorax not crenulate ]1 



11 — Sculpture coarse and moderately dense ; rather small species 12 



Sculpture very finely, longitudinally strigose ; species still more minute ....15 

 12 — Prothorax moderately transverse, with the sides parallel ; abdomen very 



strongly reticulate and dull toward base placusinus 



Prothorax strongly transverse, with the sides convergent behind 13 



13 — Sides of the prothorax distinctly emarginate just before the basal angles ; 



median sulcus of the pronotum alone distinct deilSlIS 



Sides of the prothorax not emarginate near the base ; pronotum with three 



more or less distinct longitudinal impressions 14 



14 — Sculpture very dense ; lustre dull, the abdomen reticulate and but 

 feebly shining ; antennae rather more slender and less incrassate. 



alpicola 

 Sculpture not so dense, except on the elytra of some species, the lustre some- 

 what shining ; abdomen always polished ; antennae more incrassate. 

 Elytra distinctlj'- impressed near the suture toward base ; elytral punctures 



distinct, not forming long rugae at least toward base nitidlllllS 



Elytra very narrowly impressed along the suture near the base, the punc- 

 tures indistinct, forming long coarse parallel rugae, the elytra shorter and 



more transverse than in nitidulus SUSpectus 



Elytra not in the least impressed along the suture, perfectly flat, the punc- 

 tures indistinct, forming long fine anastomosing rugae SObrinilS 



15 — Antennae longer, slender, the outer joints but slightly wider than long; 



surface more shining and less densely strigilate Tegrandis 



Antennae short, stouter, strongly incrassate, the outer joints strongly trans- 

 verse ; lustre very dull. 



