Coleopterological Notices. 423 



Pubescence denser, coarser, pale yellowish-cinereous and conspicuous. 



Prothorax rather long; eyes large, the upper lobes separated by about four 



times their width; pubescence shorter 33 bin n lit' IIS 



Prothorax about two-thirds wider than long; eyes smaller, the upper lob< - 

 separated by between five and six times their width ; pubescence longer. 



34 liespeiius 

 21. — Punctures of the elytral series fine, impressed. 



Pubescence coarse, short, recumbent and squamiform ; form oval, very 



convex 35 vestitus 



Pubescence fine, moderate in length. 



Pronotum very densely punctate throughout 37 pillialis 



Pronotum sparsely punctate, at least toward the middle ; punctures of the 

 elytral stria distant, closer in the series near the suture. 

 Oblong-oval, convex; punctures of the series distinct; pubescence 

 short, dark fulvous, rather dense but not conspicuous. 



38 arena ri ns 

 More depressed, generally subcuneiform in the male, parallel in the 

 female ; punctures of the elytral series very small ; pubescence rather 

 long, moderately abundant, cinereous and somewhat conspicuous. 



39 debilis 

 Pubescence excessively short and sparse, setiform, not distinctly visible 



except by careful examination 40 hlimilis 



Punctures of the elytral series coarse, circular, deeply perforate, very closely 

 placed, being separated generally by scarcely one-half their own diameters ; 

 pubescence rather short and coarse, abundant, pale cinereous and ex- 

 tremely conspicuous 41 pubescens 



22. — Vestiture cinereous and conspicuous ; elytral intervals scarcely wider 

 than the grooves ; pronotum narrowly reflexo-explanate at the sides. 



42 sulcatus 



Vestiture dark piceo-fulvous, very inconspicuous ; elytral intervals much 



wider than the grooves ; body more robust; pronotum more broadly ex- 



planate at the sides 43 hydropicus 



23. — Integuments not shining ; body apparently glabrous 44 discolor 



1 B. allltaceilS Casey. — B. opacus Lee: Proc. Am. Phil. Soc, XVII, 

 p. 420, 1878 (nom. pruocc). — Oblong-elliptical, rather strongly convex, black ; 

 antennae fuscous, gradually and distinctly paler toward apex ; integuments 

 smooth, very minutely strongly and evenly granulato-reticulate throughout 

 and strongly alutaceous ; pubescence almost completely wanting, consisting 

 of excessively sparse and minute erect setae, only visible under high power. 

 Head feebly convex, very minutely, rather evenly and sparsely punctate; 

 upper lobe of eyes well developed ; antenna? rather slender, gradually and 

 somewhat feebly incrassate toward apex, joints three to five uniformly and 

 very rapidly decreasing in length. Prothorax rather elongate, about three- 

 fifths wider than long, strongly narrowed from base to apex ; sides evenly ami 

 feebly arcuate ; apex distinctly emarginate in circular arc ; base transverse, 

 the lateral sinuations strong ; disk broadly, evenly convex, very minutely and 



