162 Trans. Acad. ScL of St. Louis. 



the head and prothorax, gradually and moderately iucrassate from the 

 base of the fourth joint, the latter fully as long as wide and as long as 

 the fifth, the tenth not twice as wide as long, the eleventh unusually 

 elongate, almost equaling the three preceding combined, the second 

 and third moderately elongate, subequal; prothorax as wide as the 

 elytra, wider than the base of the latter, somewhat more than one-half 

 wider than long, strongly convex, distinctly narrowed from base to 

 apes with the sides broadly and evenly arcuate, the punctures toward 

 the sides very fine, remotely scattered, the two median impressions sub- 

 obsolete, feebly punctured and only traceable toward base; elytra at the 

 sides evidently longer than the sides of the prothorax, the suture four- 

 fifths as long as the median line, the punctures moderately fine, very 

 strongly asperate and close-set throughout; abdomen as wide as the 

 elytra, but slightly tapering, finely but strongly, asperately and rather 

 closely punctate, the punctures of the impressions larger and more 

 circular than the others; hind tarsi as long as the tibiae, the basal joint 

 somewhat longer than the next two together, two to four decreasing in 

 length; mesosiernal process narrowly sublruncate. Length 4.0 mm.; 

 width 0.95 mm. Colorado (^Breckenridge), — H. F. Wickham. 



snffnsa n. sp. 

 Form rather slender, polished, black, the elytra very dark rufo-piceous, 

 almost imperceptibly shaded with black at the sides and broadly toward 

 the scutellum; legs and antennae black or piceous-black; head nearly 

 two-thirds as wide as the prothorax, scarcely at all punctate, convex, 

 the antennae much smaller than in siiffusa, two-thirds longer than the 

 head, feebly incrassate, the second joint longer than the third ; prothorax 

 two-fifths wider than long, strongly narrowed from base to apex, the 

 sides evenly and only slightly arcuate, the punctures extremely remote 

 and subobsolete laterally, the two median impressed lines feebly punc- 

 tate and obsolescent; elytra at the sides but little longer than the sides 

 of the prothorax, the suture four-fifths as long as the median line, the 

 punctures moderate in size, asperate and somewhat close-set; abdomen 

 not quite as wide as the elytra, subparallel, the puuciures sparse, 

 rather closer toward base, elongate, parallel and aciculate in form ex- 

 cept in the impressions; basal joint of the hind tarsias long as the 

 next two combined, two to four rapidly decreasing in length; mesoster- 

 ual process unusually narrow, gradually narrowed almost to a point at 

 tip, the latter however very narrowly truncate, the carina entire as 

 usual. Length 3.5 ram.; width 0.82 mm. Colorado (Leadville). 



acnmiuata n. sp. 



The species above described may be assigned to six well 

 defined groups, the first of which (1) includes all those from 

 castaneipennis to defecta, together with the European 

 cuniculorum Kr., according to the identification of Mr. 

 Fauvel, and is characterized by a narrow mesosternal process, 

 very fine and more or less incomplete carina and generally 

 fine and sparse abdominal punctures, those of the impressions 



