120 AMERICAN COLEOPTERA. 



arcuate in front, feebly sinuate behind ; hind angles very small, scarcely evident, 

 not carinate. Elytra distinctly wider than the thorax, elongate, nearly elliptical, 

 finely striate; striae distinctly punctate ; intervals flat, the third with the first 

 dorsal puncture about one-third from base, the second about one-third from apex. 

 Beneath black, shining. Legs piceous or nearly black, the tibise and tarsi usually 

 paler. Length .12-.14 inch ; 3-3.5 mm. 



Closely allied to dubitans, but distinct by the characters above 

 given. It is also related to quadrimaculatum, but is more slender 

 and more convex. It differs also in color and in the color of the 

 legs. It is often confused with dubitans in collections. 



It occurs in the Hudson Bay Territory, New Hampshire (Mt. 

 Washington), the Lake Superior region and in the more mountainous 

 parts of Colorado. 



107. B. pedicellatum Lee — Form elongate, moderately convex; color 

 seneous or a:?neo-piceous, shining, the elytra with a subluimeral spot and usually 

 a submarginal one about one-third from apex, yellow. Head large, scarcely nar- 

 rower than the thorax ; palpi rufous ; antennse rather more than one-half the 

 length of the body, fuscous, the basal joints testaceous. Prothorax cordate, 

 scarcely wider than long, nearly one-half narrower at base than apex ; apex 

 truncate ; median line fine, abbreviated before and behind ; transverse impres- 

 sions feeble ; basal impressions very small, unistriate ; sides with the margin very 

 narrowly reflexed, arcuate in front, sinuate behind ; hind angles very small and 

 scarcely evident, subrectangular, not carinate. Elytra distinctly wider than the 

 thorax, oblong-ovate, finely striate ; striae very distinctly, not closely punctate; 

 intervals nearly flat, the third with the first dorsal puncture about one-third from 

 ba.«e, the second about one-third from apex. Beneath black, shining. Legs pale 

 yellowish testaceous. Length .12-.15 inch : 3-3.75 mm. 



This species is most nearly related to quadrimaculatum, but is more 

 convex, with the thorax more elongate, and the elytra shorter with 

 the punctures of the strise larger and less closely placed. The elytral 

 spots are nmch smaller and less conspicuous. 



It is known to me from Pennsylvania, the District of Columbia, 

 Maryland and Missouri. 



108. B. qiiadrimaciilatuin Linn. — Form moderately elongate, slightly 

 depressed. Head and thorax geneous, or nigro-seneous, shining; elytra varying 

 from brownish to nearly black, more or less aeneous, shining, with a large, trian- 

 gular post-humeral spot yellow and another smaller one, of the same color, near 

 the margin, about one-third from apex, extending more or less transversely to- 

 wards the suture. Head large, wider than the thorax at apex; palpi fuscous, 

 darker towards the tip ; anteunte about one-half the length of the body, piceous, 

 the basal joints testaceons. Prothorax cordate, more than one-half wider than 

 long, distinctly narrower at base than apex, sparsely punctate at base, ihe disc 

 feebly convex ; apex truncate; median line fine, extending between the trans- 

 verse impressions, which are moderately distinct; basal impressions small and 

 close to the angle, unistriate ; sides with the mai'gin very narrowly reflexed, 



