78 AMERICAN COLEOPTERA. 



elytra often somewhat brownish with a submarginal pale spot about one-fonrtfa 

 from apex, which extends more or less transversely towards the suture. Head 

 as wide as the thorax at apex ; palpi testaceous, darker towards the tip; antennae 

 about one-half the length of the body, piceous, the first and usually the second 

 and third joints testaceous. Prothorax scarcely one-half wider than long, 

 slightly narrower at base than apex, more or less punctulate at base ; apex slightly 

 emarginate ; median line distinct, abbreviated in front ; transverse impressions 

 distinct; basal impressions broad, deep, bistriate ; sides with the margin narrowly 

 refiexed, arcuate in front, sinuate behind ; hind angles rectangular, carinate. 

 Elytra about one-half wider than the thorax, oblong-oval, moderately finely 

 striate, much more finely at sides and apex ; strige distinctly punctate, the punc- 

 tures becoming obsolete towards the tip, the five inner entire ; third stria with 

 the first dorsal puncture about one-third from base, the second about one-third 

 from apex; intervals scarcely convex. Beneath black, shining. Legs varying 

 from yellowish testaceous to rufous, sometimes with the femora piceous. Length 

 .20-.25 inch ; 5-6.25 mm. 



This species is subject to some variation. The submarginal spot 

 of the elytra usually extends slightly transversely towards the suture, 

 forming in some specimens almost a transverse band ; rarely, how- 

 ever, it is entirely wanting. The legs in typical examples are yel- 

 lowish testaceous. They vary, however, to rufous, and the femora 

 are sometimes more or less piceous. Such specimens closely resemble 

 consangnineam, and can be separated only by their more elongate 

 form, with the thorax slightly narrower at base than apex. 



It occurs along the Pacific coast from British Columbia to Cali- 

 fornia, extending eastward to the Rocky Mountains. 



47. B. platynoides n. sp.— Larger and less convex than B. striola, form 

 more dilated ; color black, strongly tinged with blue, shining. Head as wide as 

 the thorax at apex; palpi piceous or rufo-piceous ; antennae about one-half the 

 length of the body, piceous, the basal joints slightly rufous. Prothorax about 

 one-half wider than long, slightly narrower at base than apex, slightly rugose at 

 base; apex nearly truncate ; median line distinct, abbreviated in front; trans- 

 verse impressions moderately distinct; basal impressions broad, deep, bistriate; 

 sides with the margin narrowly refiexed. arcuate to behind the middle, strongly 

 sinuate in front of the hind angles, which are sub-acute and carinate. ' Elytra 

 about one-half wider than the thorax, oblong-oval, striate ; stride distinctly punc- 

 tate to behind the middle, the inner ones moderately deep, the outer ones much 

 finer, the first and second only entire, the fifth represented by a groove at tip ; 

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

 about one-third from apex ; intervals feebly convex, the outer ones nearly flat. 

 Legs piceous or rufo-piceous, the femora darker. Length .24-.27 inch ; 6-6.75 mm. 



Most nearly related to striola, from which it differs by its larger 

 size, more dilated and slightly less convex form, with the thorax 

 slightly more narrowed behind and the hind angles sub-acute. The 

 elvtra are more oval, without trace of the submarginal spot which 



