198 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Hahitat. — Texas (Beeville, Coll. Hubbard and Schwarz) ; Kansas 

 (Gove County, elevation 2,500 feet, F. H. Snow) ; Colorado (Denver, 

 April, H. Soitau) ; Dakota (Bufl'alo Gap, Collector A. E. Hill). 



Number of specimens studied, 28. 



Type destroyed. 



Type-locality. — "Near Council Bluffs, Missouri'' (Say). 



SalicDt type-characters. — Elytra scabrous, (grooved; sutural margin 

 reddish-brown ; external edge narrowly rounded and acute at humeri. 

 Thoracic margin not reflected (Say). 



Dkigno^itic ch((?Y(ctcrs. — From ohscura it is known by the elytra 

 being quite suddenly inflexed laterally and therefore very narrowly 

 rounded at the sides, and by the margins being acute at the humeri ; 

 from suturalis by the pronotal disc being convex and not reflexed 

 laterally. 



In some specimens the elytral margins are subacute and the disc 

 quite flat, so that the passage to suturalis becomes easy. The form 

 of the pronotum is quite constant. 



The heterotypes of the series before me resemble ohscnra on the one 

 hand and texana on the other. 



The middle lobe of the mentum is moderate, subtrapezoidal or sub- 

 parabolic, apex arcuate or subtruncate with the sides straight and 

 converging to apex ; surface strongly and rather densely punctate, 

 scarcely convex, obsoletely foveate laterally and quite densely setose. 



The prosternum is strongly prominent ventrally with the coxa?, 

 surface usually nearly horizontal, moderately comj^ressed behind and 

 vertically truncate, scarcely produced. These characters are most 

 often observed in those specimens which have the elytral disc quite 

 flat and margins subacute; frequently the prosternum is convex 

 antero-posteriorly and oblique behind, these characters being observed 

 in those examples with convex elytral disc and more broadly rounded 

 margins; rarely it is continuously convex between the coxae. 



Mesosternum variable. Usually obliquely declivous and more or 

 less concave; frequently quite arcuately declivous to somewhat ver- 

 tically so and more or less feebly concave. 



The abdominal intercoxal salient is subquadrate, slightly transverse, 

 and about as wide as the post-coxal i)ortion of the first segment is 

 long; third segment about one-third of its length shorter than the 

 second ; the fourth one-fourth shorter than the third. 



I'he metasternal i))'ocess is scarcely one-half narrower than the 

 abdominal. Metastei'num laterally between the coxa' is as long as 

 the width of a mesotibia at apex. 



The tibial grooves of the femora are entire on the profemora and 

 variable in length on the meso- and metafemora. 



The profemora have the tibial grooves rather broad, with the 

 sides slightly arcuate and converging quite to the femoral base; their 



