ROLAND HAYWARD. 79 



is usually present iu that species, and with the first and second strise 

 only entire. It differs also in color and has a rather different facies, 

 recalling, at first sight, certain species of Platymis. 



The males are slightly more slender than the females. 



About a dozen specimens have been examined, all from California. 

 The above description was taken from two examples in Dr. Horn's 

 collection from the headwaters of the Kern River, and two from 

 Pomona, sent to me by Mr. H. C. Fall, to whom I am indebted for 

 the single specimen in my cabinet. 



48. B. biiiiaciilatum Kirby. — Form elongate, very convex ; color nearly 

 black, slightly seneous. the elytra often more or less brownish, usually with a pale 

 submarginal spot about one-fourth from apex, which often extends very obliquely 

 towards the suture. Head small, narrower than the thorax at apex ; palpi rufous 

 or rufo-piceous: anteimse scarcely one-half as long as the body, piceous, the first 

 joint rufous. Prothorax very convex, depressed at base, about one-half wider 

 than long, distinctly narrower at base than apex, rugose at base : apex slightly 

 emarginate ; median line distinct, abbreviated before and behind ; transverse im- 

 pressions distinct, the anterior angulate; basal impressions small, deep, bistriate; 

 sides with the margin narrowly reflexed, strongly arcuate, suddenly constricted 

 and sinuate behind ; hind angles rectangular, carinate. Elytra less than one-half 

 wider than the thorax, oblong-oval, rather finely striate, very finely at the sides 

 and towards the tip ; striae distinctly punctate to behind the middle, the five inner 

 entire, the fifth grooved at apex ; third stria with the first dorsal puncture about 

 one-third from base, the second about one-third from apex ; intervals feebly con- 

 vex, the outer ones nearly flat. Legs rufous, the femora usually slightly darker. 

 Length .24-. 30 inch ; 6-7.5 mm. 



An easily recognized species. 



It is essentially Northern in its distribution, extending across the 

 continent from the Atlantic to the Pacific It occurs in Canada, the 

 Hudson Bay Territory, Manitoba, Alberta, Wyoming, Colorado and 

 the Rocky Mountains, Nevada, Washington and British Columbia. 



49. B. postreiniim Say. — Moderately elongate, very convex. Head and 

 thorax nigro-feueous, shining, the elytra brownish seneous with a large, oblique 

 submarginal spot about one-third from apex. Head rather small, narrower than 

 the thorax at apex ; palpi pale yellowish testaceous ; antennse rather more than 

 one-half the length of the body, fuscous, the basal joints paler. Prothorax about 

 one-half wider than long, distinctly narrower at base than apex, punctate at base ; 

 apex nearly truncate; median line distinct, abbreviated in front; transverse im- 

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

 very narrowly reflexed, strongly arcuate in front, suddenly constricted and sinu- 

 ate behind ; hind angles rectangular, carinate. Elytra slightly wider than the 

 thorax, oblong-oval, deeply striate ; stria* strongly punctate to behind the middle, 

 dilated on the disc, less deeply impressed at the sides and very fine, nearly effliced. 

 towards the apex, the fifth slightly grooved at tip; third stria with the first dorsal 

 puncture about one-tbird from base, the second about one-third from ai)ex ; iu- 



TKANS. AM. ENT. SOC. XXIV. MARCH, 1897. 



