Coleopterological Notices. 421 



Eyes very large, their upper lobes separated by about four times their 

 width ; sides of the prothorax less strongly arcuate, the pronotnm 

 rather more finely and much less conliuently punctate ; elytral striae 



scarcely perceptibly impressed 12 histricus 



9, — Prouotum densely punctate throughout 10 



Pronotum sparsely punctate, at least toward the middle of the disk 13 



lO. — Pubescence pale cinereous or yellowish-cinereous, conspicuous 11 



Pubescence darker, piceous to dark fulvous, not at all conspicuous 12 



11. — Size small ; pubescence very long ; elytral striae not distinctly impressed. 



36 liospes 

 Larger ; pubescence shorter, coarser and not quite so conspicuous ; elytral 



strife distinctly but not strongly impressed 14 oregonensis 



12. — Pronotum coarsely punctate, the apex very feebly incurvate, sometimes 



almost truncate, the apical angles distinctly rounded, the basal very 



obtuse and generally slightly rounded, at least in the male. 



Form subdepressed ; elytral striae extremely feebly impressed... .1,15 niger 



Form very convex ; elytral striae strongly impressed and more coarsely 



punctured ; sides of the prothorax more strongly arcuate ; size larger ; 



form more robust 16 cribricollis 



Pronotum more finely punctate ; apex more deeply emarginate in circular arc ; 



apical angles not distinctly rounded ; basal usually rather prominent, not 



in the least rounded and not obtuse, the basal sinuations more pronounced. 



Wings nearly as long as the elytra ; punctures of the elytral series widely 



separated 17 fuliginosiIS 



Wings rudimentary but not excessively so ; strial punctures very small and 

 closely placed. 

 Abdominal pubescence long, rather coarse, flavate and conspicuous. 



18 rufipes 

 Abdominal pubescence short, dark fulvo-piceous and inconspicuous. 

 Third antennal joint of the male long, nearly equal to the next two 

 together, tenth fully two-thirds wider than long ; elytral striae dis- 

 tinctly impressed 19 crassicoriiis 



Third antennal joint in the male short, very much shorter than the 

 next two, tenth scarcely one-half wider than long ; elytral striae very 

 feebly impressed ; form of body much more elongate. 



20 elongatus 

 13. — Wings but moderately rudimentary, always distinctly more thau one- 

 half as long as the elytra 14 



Wings very rudimentary, always distinctly less than one-half as long as the 



elytra.i 15 



14. — Elytral intervals very minutely punctate, the strial punctures much 

 larger and I'ather distant. 



1 In the case of cequalis, lepidus and funehris, no dissection has been made to 

 determine the form of the wings, but as the elytra are subconnate, and the 

 other characters indicate them to be close homologues of pulverulentus, I think 

 that the position here assigned them will prove correct. 



