Elytra dark brown to yellowish brown, thorax black phaeopterus 



Elytra nearly black like the thorax, the margins only narrowly 

 brownish bicolor 



32. Male protarsi very feebly dilated, and with small palettes beneath; 

 intralinear area of hind coxae not rugose . confinis 



Male protarsi rather broadly dilated, with large palettes beneath; in- 

 tralinear area of hind coxae rugose infuscatus 



33. Prosternal process flat, the surface a little concave at the point of 

 maximum width; side margins of the thorax in the female sinuate at 

 front angles ; color above brownish fuscous, with sides and transverse 

 median fascia or entire apical half of thorax, and side margins of 



elytra, testaceous ., arcticus 



Prosternal process not flat, sides of thorax not sinuate anteriorly in 



the female :....- 34 



34. Meshes of elytral reticulation very small, rounded, and subequal (ex- 

 cept in part in ontarionis.) .. , 35 



Meshes of elytral reticulation much larger, irregular and unequal, and 

 showing within themselves a secondary system of minute reticulation 

 most noticeable toward the sides and apex, and as a rule more evident 



in the females; color black or blackish throughout (except tristis, 

 which varies from brown to nearly black.) 36 



35. Color blackish brown, the prothorax nearly black except the side mar- 

 gins; protarsal claws of male elongate, nearly straight, sinuate, 



equal, claw joint not toothed beneath ontarionis 



Color above and beneath dull brownish testaceous, or yellowish brown. 



Protarsal claws of male elongate, equal, the claw joint dentate 

 beneath ajax 



Protarsal claws of male very unequal, the anterior scarcely half 



the length of the posterior coxalis 



36. Pro- and mesotarsi of male with extremely large circular palettes be- 

 neath; metasternal groove long; size rather small or moderate (7 to 



8 mm.) . anthracinus 



Pro- and mesotarsi of male with much smaller though quite distinct 

 palettes; metasternal groove short, rudimentary; size large (9 to n 



mm.) nigroaeneus 



Pro- and mesotarsi of male without distinct palettes beneath 37 



37. Meshes of elytral reticulation not longitudinal (sometimes oblique 



basally in the female of tristis.} 38 



Meshes of elytral reticulation wholly or in great part strongly elongate 

 (less conspicuously so in the male of leptapsis.) 39 



38. Metasternal groove rudimentary; middle coxae narrowly separated 



confertus 



Metasternal groove well developed, subhorizontal ; mesocoxae less ap- 

 proximate. 



Form rather broadly oval, color black, size smaller (8 to 9 mm.) 



gagates 



Form elongate oval, color brownish to blackish fuscous, size 

 larger (g l / 2 to iQ l / 2 mm.) :. tristis 



8 



