26 MEMOIRS ON THE COLEOPTERA 



black condensations of the alternate intervals narrow and not con- 

 trasting so greatly as in the preceding, the transverse pale lines ex- 

 tremely feebly denned, the hairs forming the spots scanty, densely 

 punctate; metasternum with a fine smooth and even median line, 

 the mesosternal sinus shallow. Length 5.8 mm.; width 3.7 mm. 

 Wyoming (Laramie) and Manitoba (Aweme) laramiensis n. sp. 



Form nearly as in the preceding but still stouter, deep black throughout, 

 the legs not distinctly picescent; head nearly as in the preceding 

 throughout but with still shorter, blacker and less evident pubescence; 

 prothorax nearly similar in form and sculpture but rather larger, with 

 the pubescence notably shorter, more even and scarcely at all 

 variegated, the black pairs scarcely at all linearly aggregated; elytra 

 slightly more than a fifth longer than wide, nearly as in the preceding 

 but with the black pubescence shorter, scantier and with the con- 

 densations on the alternate intervals much less marked and less 

 prominent, the transverse silvery bands feeble, irregular, the figure 

 inclosed being much more than twice as wide as long; asperulate 

 punctures of the abdomen very fine but distinct, well separated among 

 themselves, each bearing a very short but unusually thick yellowish- 

 silvery glistening hair, the closely and rugosely punctured meta- 

 sternum similarly clothed; mesosternal sinus rather deep, only a 

 third as wide as the anterior margin of the mesosternum. Length 

 6.0 mm.; width 3.85 mm. Wisconsin (Bayfield), Wickham. 



rigens n. sp. 



12 Elytra with a transverse figure, formed by nearly similar transverse 

 bands, sinuate posteriorly. Oval, subacute anteriorly and poste- 

 riorly, convex, black, the pubescence olivaceous, the pronotum varie- 

 gated with cinereous; elytra subtessellate with black and cinereous, 

 with a pale transverse maculation crossing the suture near the mid- 

 dle; antennae and tarsi rufo-piceous, the former with the last joint 

 subacuminate. Length 5.5 mm. Lake Superior (northern shore). 

 [B. eximins Lee., Agassiz, Lake Superior, 1850, p. 224]. 



eximius Lee. 



Elytra with a very indistinct closed transverse crescentiform space, the 

 transverse bands fine, very incomplete but of the same nature as in 

 americanus, the anterior sutural part slightly more distinct. Elon- 

 gate-oval, parallel, black, the tarsi rufo-piceous; head well developed, 

 moderately convex, strongly, very densely punctate, with a mixture 

 of blackish and fulvous, very coarse hairs and a fine impunctate 

 transverse submedial line; prothorax of the usual form, finely, 

 deeply, densely punctate, the pubescence unusually long, coarse, 

 fulvous and blackish, much though indefinitely variegated; scu- 

 tellum densely clothed with black and a few fulvous hairs; elytra 

 fully a fourth longer than wide, very obtuse at apex, parallel or 

 perhaps very faintly posteriorly inflated, the sides nearly straight 

 in basal two-thirds; pubescence not very short, coarse, bright 

 fulvous-yellow and blackish indiscriminately mingled, the alternate 

 intervals with elongate areas of more condensed blackish hairs; 

 abdomen shining, finely but strongly, closely, asperately punctate, 

 the hairs very short, fine and inconspicuous; metasternum strongly, 



