362 CASEY 



more converging apically, widest behind the middle, the sinuate 

 apex distinctly narrower than the base, the punctures relatively 

 large, very deep and close-set, somewhat uneven, becoming gradu- 

 ally rather coarse and very close laterally ; scutellum small, quad- 

 rate ; elytra fully one-half longer than wide, three times as long as 

 the prothorax but only just visibly wider, the sides very feebly 

 arcuate, the punctures fine, rather sparse, confused though with 

 some feebly defined and subeven series toward the sides ; abdomen 

 highly polished, rather sparsely but not very finely, strongly 

 punctured medially. Length5.2 mm. ; width2.28mm. Colorado. 



acuminatus n. sp. 



Elytra more rapidly, arcuately narrowed and obtusely ogival at tip.. 18 



18 — Antennas very short, the seventh and eighth joints wider than 



long. Body very small, oblong-oval, moderately convex, rather 

 stout and shining, deep black, the legs piceo-rufous ; head small, 

 not as wide as an elytron, rather finely but strongly, closely punc- 

 tate, broadly arcuate at apex, the sides almost parallel, the angles 

 broadly rounded but evident ; prothorax about three-fifths wider 

 than long, widest just behind the middle, the sides distinctly arcu- 

 ate, more feebly so and feebly converging before the widest sec- 

 tion, more abruptly rounded posteriorly to the ante-angular sinus, 

 the apex rather feebly sinuate, but little narrower than the base, 

 the punctures strong, separated by nearly twice their diameters, 

 gradually but little larger and irregular but very close-set in part 

 laterally; scutellum moderate, transverse; elytra inflated, two- 

 fifths longer than wide, barely three times as long as the prothorax, 

 and, at the middle, nearly a fifth wider, the sides parallel and dis- 

 tinctly arcuate, the punctures fine and sparse but rather deep, 

 confused though with some feebly defined series basally and 

 laterally ; abdomen finely, sparsely punctured medially. Length 

 4.3 mm.; width 1.95 mm. Colorado (Garland)... parvus n. sp. 



Antennae less abbreviated, the eighth joint fully as long as wide as 

 usual 19 



19 — Form rather stout, oblong, parallel, rather strongly shining, deep 



black, the legs piceo-rufous ; head small, very evidently narrower 

 than an elytron, nearly as in parvus but more acicularly punc- 

 tured ; prothorax relatively larger, three-fifths wider than long, 

 widest near the middle, nearly as in parvus^ the punctures rather 

 finer and closer but similarly deep and perforate, becoming grad- 

 ually but little larger though very close-set and even laterally and 

 with a rounded median impression at base ; scutellum small, 

 transverse ; elytra less oval, not inflated, two-fifths longer than 

 wide, scarcely more than two and one-half times as long as the 

 prothorax and not evidently wider, the sides parallel and feebly 

 arcuate, the punctures minute, rather sparse, confused though 

 with feeble evidences of irregular series basallv and laterally ; ab- 

 domen smooth, polished, slightlv rufescent, not very finely but 

 sparsely punctate. Length 4.7 mm. ; width 2. 1 7 mm. Nebraska. 



acutus Horn 



