68 . AMERICAN COLEOPTERA. 



apex ; palpi black ; anteniise about one-half as long as the body, black. Prothorax 

 nearly twice as wide as long, scarcely narrower at base than apex, finely rugose 

 at base; apex slightly emarginate ; median line deep, abbreviated before and 

 behind; transverse impressions distinct; basal impressions broad, deep, bistriate; 

 sides with the margin narrowly but distinctly reflexed. arcuate from apex to 

 base: hind angles obtuse, but not rounded, carinate. Elytra slightly wider than 

 the thorax, oblong-ovate, finely striate ; strise entire, irapunctate, the outer some- 

 times so fine as to appear nearly obsolete ; third stria with the dorsal punctures 

 large, the first slightly in front of the middle, the second about one-fourth from 

 apex; intervals nearly flat. Beneath black, shining. Legs black. Length .17- 

 .23 inch ; 4.25 5.75 mm. 



As above defined this species seems distinct from any of the group. 

 After a careful study of the descriptions and of a moderate series 

 of specimens I am convinced that tetraglyptum Mann, is synonymous. 



It seems most closely related to breve Mots., from which it differs 

 by its entire, impunctate strise. It is also somewhat larger than that 

 species, and is usually less bi-onzed. The stride of the elytra vary 

 considerably in depth, in some examples being so fine as to appear 

 almost obsolete, although after careful examination they are seen to 

 be entire, though very finely impressed. The fifth stria is grooved 

 at tip. 



It occurs as far east as Manjuettei^Iicll- , at Bayfield, Wis. (Wick- 

 ham), in the Yellowstone Park, Wyo. (Bowditch), throughout the 

 mountainous parts of Colorado, New Mexico (Snow), Nevada, and 

 on the Pacific coast from California to Alaska. It was taken in 

 moderate abundance by Mr. Bowditch and myself near the edge of 

 the melting snow in the mountains southwest of Montrose, Col., at 

 an altitude of about 10,000 feet. 



36. B. breve Mots. — Form broad, slightly depressed ; color black, usually 

 bronzed, very shining. Head as wide as the thorax at apex ; palpi black ; an- 

 tennse about one-half the length of the body, black. Prothorax more than one- 

 half wider than long, slightly narrower at base than apex, slightly rugose at base ; 

 apex slightly emarginate; median line distinct, sub-entire ; transverse impressions 

 feeble, basal impressions broad, moderately deep, bistriate; sides with the margin 

 narrowly reflexed, arcuate in front, oblique behind ; hind angles obtuse, but not 

 rounded, carinate. Elytra nearly one-half wider than the thorax, oblong-ovate, 

 finely striate: striae finely punctate, all but the first abbreviated behind, the fifth 

 represented by a groove at apex, the seventh wanting, the sixth often nearly ob- 

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

 second about one-third from apex ; intervals flat. Beneath black, shining. Legs 

 black. Length .15-.18 inch : 3.75-4.5 mm. 



The species above described agrees with Motschulsky's description 

 so far as it goes, as well as with that published by Mannerheim some 

 vears later. It therefore seems best to me to refer the specimens 



