198 MEMOIRS ON THE COLEOPTERA 



tip, the basal obliquely everted and acute; elytra one-half to three- 

 fifths longer than wide, parallel, at the middle very slightly wider 

 than the prothorax, the sides feebly arcuate, rounding inward and 

 becoming rapidly oblique in posterior two-fifths, the side margins 

 feebly reflexed basally as usual; surface with large irregular shallow 

 indents, sometimes so arranged as to give an appearance of four or 

 five feebly elevated longitudinal lines, the minute punctures rather 

 close-set, asperulate, each with a very minute short seta; abdomen 

 with minute anastomosing creases, punctate posteriorly; legs rela- 

 tively somewhat short and slender. Length (cf , 9 ) 13.5-17.8 mm.; 

 width 6.2-8.6 mm. Kansas, Colorado and Montana, Austin, 

 Knaus and others. [Asida opaca Say] opaca Say. 



Form narrower and less parallel, the size smaller, blackish-piceous in 

 color, opaque; head nearly similar but less impressed and more finely 

 punctate; prothorax smaller, three-fifths wider than long, the oblique 

 sides before the middle much less arcuate, otherwise similar, the 

 punctures rather coarse, very dense and subasperate, the upturned 

 lateral margins rather thinner; elytra at base exactly equal in width 

 to the distance between the apices of the thoracic angles but wider 

 than any other part of the prothorax, two-thirds longer than wide, 

 widest at the middle, where they are fully a fifth wider than the 

 prothorax, similar to those of opaca throughout, except that the 

 sides are rather more arcuate and especially more obliquely narrowed 

 behind from only slightly behind the middle; under surface rather 

 shining, nearly as in opaca. Length (d 71 , 9) 14.0-16.0 mm.; width 

 6.7-7.1 mm. Kansas, Snow collega n. sp. 



6 Body very short and broad, grayish-black throughout, opaque, alu- 

 taceous beneath; head rather strongly, transversely impressed, some- 

 what strongly, closely punctate, the small pale hairs very distinct; 

 prothorax formed and sculptured as in opaca, except that the sides 

 at the middle are not broadly rounded but very obtusely subangulate, 

 the acute basal angles less everted; elytra very short, only just 

 visibly longer than wide, at base wider than any part of the pro- 

 thorax, and, at the middle, fully a third wider than the median part 

 of the latter, the sides parallel and broadly arcuate, rapidly rounding 

 and converging in a little less than apical two-fifths, the apical lobe 

 large and obtusely rounded but distinct; surface less convex than 

 in any of the preceding species, in fact almost flat, the approxi- 

 mately four narrow tumid lines on each distinct, the minute granu- 

 liferous punctures sparse, each bearing the usual very minute pale 

 seta; side margins somewhat reflexed throughout but more obviously 

 toward base, the humeral angles obtuse, thickened and rounded; 

 abdomen minutely but rather strongly sculptured, more punctured 

 posteriorly as usual; legs slender, the tarsi rather long. Length (cf) 

 14.0 mm.; width 7.1 mm. New Mexico (Las Vegas). 



abbreviata n. sp. 



Body much narrower, similarly deep grayish-black and opaque, somewhat 

 sericeous; head scarcely impressed, finely, sparsely punctate, the 

 small hairs very distinct; prothorax smaller than in any other species, 



