516 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [YolY. 



cate in front. Elytra more elongate than usual, but little wider than 

 the jDrothorax (in 5 ), not perceptibly punctured. Length, 2™™. 



Garland, Colo. ; one pair. The tips of the elytra in the ^ are con- 

 torted as usual, and yellow ; the ventral segments are entirely black, 

 the last is broadly and deeply emarginate at tip, and not sulcate. Dif- 

 fers from P. pusillus by the legs not being yellow, and probably by the 

 sexual characters, though my $ specimen of the latter is not in good 

 condition. 



Eenobius tristis. — ( $ ) Elongate, black, shining, finely and scarcely 

 perceptibly pubescent, finely scabrous-punctate. Eyes moderate in size, 

 but very convex. Antennae half as long as the body, slender, 2d joint 

 stouter than 3d ; 3d, 5th and 7th a little longer than the 4th, 6th, and 

 8th ; 9th as long as the 5 preceding united, 10th a little shorter, 11th as 

 long as the 9th. Prothorax twice as wide as long, much rounded on the 

 sides, which are strongly margined. Elytra finely margined. Length, 

 3.5™"^. 



Yeta Pass ; one $ . 



Ernobius gracilis. — Elongate, rufo-testaceous, less shining, finely 

 pubescent, densely scabrous-punctulate. Eyes moderate in size, very- 

 convex. Antennae half the length of the body, rather stout, joints 3-8 

 nearly equal in length, 5th-8th wider than 3d and 4th j 9th as long as 

 the 5 preceding united, 10th and 11th each as long as the 9th. Pro- 

 thorax more than twice as wide as long, sides very much rounded and 

 widely margined, concavity of the margin extending along the base to 

 a basal fovea, where it becomes narrower. Elytra convex finely mar- 

 gined. Length, 3.7°'°^. 



Garland, Colo.; one $. These two species are quite different from 

 those tabulated by me in Proc. Ac. l^at. Sc. Phila. 1865, 224. 



The following species from other districts may be described with ad- 

 vantage on the jjresent occasion : 



Ernobius luteipennis. — Less elongate, piceous, not shining, finely 

 pubescent, elytra dirty reddish yellow, finely punctured and slightly 

 scabrous. Head and prothorax opaque, densely and finely scabrous. 

 Eyes convex, smaller in 2 than $ ; antennae 2d joint stout, not much 

 longer than thick ; 3d slender, longer than 4th; 4-8 gradually shorter, 

 but not wider ; 9-11 varying, as below, according to sex. Prothorax 

 twice as wide as long, narrowed in front, sides moderately rounded, 

 finely margined. Tibiae and tarsi testaceous. Length, 2.5-3'"'". 



Massachusetts, on pine boughs ; one pair kindly given me by Mr. 

 Frederick Blanchard ; found also at White Fish Point, Lake Superior, 

 by Mr. H. G. Hubbard. The antennae of the S are more than J as long 

 as the body, and the joints 9-11 are long and narrow, each being as 

 long as the lst-8th united. In the 9 the same joints are wider and 

 each equal in length to the 4th-8th united. This is aUied to E. tenuicor- 



