66 AMERICAN COLEOPTERA. 



more convex thorax, which is at most only slightly wider thau long, 

 and is more narrowed at base than in the two species last named, 

 with the sides more distinctly sinuate behind. The form is more 

 elongate than in any except nignmerukum. 



Described by LeConte from the Saskatchewan River. It is known 

 to me also from Alaska, Vancouver Island, British C.|oJhinibia, Wash- 

 ington, Duusmuir, Cal. and Nevada. 



32. B. nigrocfleruleuin n. sp.— Form moderately elongate, slightly con- 

 vex ; color bluish black, shining. Head as wide as the thorax at apex ; palpi 

 black ; aniennae about cue-half as long as the body, nearly black. Prothorax less 

 convex than in funerenm, about one-half wider than long, slightly narrower at 

 base than apex, finely rugose at base; apex feebly eniarginate : median line dis- 

 tinct, abbreviated before and behind ; transverse impressions distinct ; basal im- 

 pressions broad, deep, bistriate ; sides with the margin distinctly rellexed, arcuate 

 in front, distinctly sinuate behind : hind angles subacute, carinate. Elytra rather 

 more than one-half wider than the thorax, nearly oval, rather finely striate ; 

 striaj entire, impunctate, scarcely less deeply impressed at sides and tip, the fifth 

 ending in a deep groove ; third stria with the first dorsal puncture about one-third 

 from base, the second about one-third from apex : intervals nearly flat. Beneath 

 black, shining. Femora black, tibiae and tarsi piceous. Length .19-. 24 inch ; 

 4.75 6 mm. 



Most nearly related to funereum, but sufficiently distinct by its 

 less convex and proportionally wider thorax, with the hind angles 

 subacute, and by the more deeply striate elytra, with the striae scarcely 

 finer at sides and tip, as well as by its different color. The size 

 averages slightly larger. 



The seven specimens known to me are all from Washington. For 

 the single example in my cabinet I am indebted to Dr. Horn. 



33. B. iiiaekliiii Lee. mss. — Form moderately robust, sliglitly convex ; 

 color black, slightly neneous, shining, tlie elytra tinged with brown. Head as 

 wide as the thorax at apex; palpi piceous; antennse about one-half the length 

 of the body, piceous, the first joint dark rufous. Prothorax about one-half wider 

 than long, as wide at base as apex, rugose at base ; apex nearly truncate : median 

 line distinct, extending between the transverse im])ressions, which are distinct ; 

 basal impressions broad, moderately deep, bistriate ; sides with the margin nar- 

 rowly but distinctly reflexed, an-uate in front, oblique behind ; hind angles sub- 

 obtuse, but not rounded, carinate. Elytra about one-half wider than the thorax, 

 oblong-oval, finely striate; stripe entire, impunctate, more finely impressed at 

 sides and apex, the fifth grooved at tip ; third stria with the first dorsal puncture 

 slightly in front of the middle, the second about one-fourth from apex ; intervals 

 flat. Beneath nearly black, shining. Legs rufo-piceous. Length .18-. 20 inch I 

 4.5 5 mm. 



Broader and less elongate than funereum, with the thorax pro- 

 portionally wider as compared with its length, the sides not sinuate 



