82 AMERICAN COLEOPTERA. 



53. B. scopiilinuni Kirhy. — Form slender, elongate, convex. Hearl and 

 thorax nigro-geneous, tbe elytra seneo-piceous, usually more or less brownish to- 

 wards the base, with a large submarginal pale spot about one-third from apex, 

 which is very rarely wanting. Head as wide as the thorax at apex : palpi rufous, 

 darker towards the tip; antennse more than one-half the length of the body, 

 piceous, the basal joints rufous. Prothorax as long as wide, distinctly narrower 

 at base than apex, scarcely punctulate at base ; apex truncate ; median line dis- 

 tinct, abbreviated in front; transverse impressions distinct; basal impressions 

 deep, bistriate ; sides with the margin very narrowly reflexed, strongly arcuate 

 in front, distinctly sinuate behind ; hind angles rectangular or slightly sub-acute, 

 tinely carinate. Elytra about one-half wider than the thorax, widest slightly 

 behind the middle, oblong-ovate, moderately finely striate ; stripe distinctly punc- 

 tate to behind the middle, the first and second entire, the fifth represented by a 

 groove at tip ; third stria with the first dorsal puncture rather more than one- 

 third from base, the second about one-fourth from apex ; intervals feebly convex. 

 Beneath black, shining. Legs rufo-testaceous. Length .16-. 20 inch ; 4-5 mm. 



A very pretty and well-marked species, abimdantly distinct from 

 the others of the group by the characters given above. It was de- 

 scribed by LeConte under the name of gelidum (Ann, Lye, iv, 1848, 

 p. 464), scopuliiium Kirby being then regarded by him as a synonym 

 of jyrostremwn Say. 



It occurs throughout the more northern portions of the region 

 east of the Rocky Mountains, being known to me from Labrador 

 and the Gulf of the St. Lawrence (Henshaw), Canada, New Hamp- 

 shire, Vermont, Connecticut, New York, Michigan and the Lake 

 Superior region, Manitoba, Wisconsin and Colorado. 



54. B. picipes Kirby. — Less slender than scopidhium, moderately convex ; 

 color black, shining, sometimes slightly aeneous or bluish, the elytra usually im- 

 maculate, rarely with a submarginal pale spot about one-fourth from apex. Head 

 as wide as the thorax at apex ; palpi rufous; antennae more than one-half as long 

 as the body, piceous or fuscous, the basal .joints rufous. Prothorax about one- 

 half wider than long, narrower at base than apex, more or less rugose at base; 

 apex feebly emarginate; median line fine, usually abbreviated in front; trans- 

 verse impressions distinct ; basal impressions deep, bistriate ; sides with the mar- 

 gin narrowly reflexed, moderately strongly arcuate in front, sinuate behind ; 

 hind angles lectangular, carinate. Elytra about one-half wider than the thorax, 

 oblong-oval, rather deeply striate; striae coarsely and deeply punctate to behind 

 the middle, the first and second only entire, the fifth represented at apex by a 

 groove; third stria with the first dorsal puncture about one-third from base, the 

 second about one-third from apex ; intervals moderately convex. Beneath nearly 

 black, shining. Legs rufous. Length .20-. 24 inch ; 5-6 mm. 



Quite distinct by the characters above given. Specimens with a 

 submarginal pale spot { plagiatum Zimm.) bear some resemblance to 

 scopulinvm, but may be readily distinguished by the proportionally 

 wider thorax and less convex and broader form. 



