HlSTERID/E 2O9 



front and tending to brief medial discontinuity; prothorax trans- 

 verse, the moderately converging sides evenly but feebly arcuate, 

 slightly more rounding at apex; surface smooth, the lateral striae 

 very widely separated and not coarse, the included surface with 

 some short rugulae anteriorly; elytra short, more than a third wider 

 than long, slightly wider than the prothorax though only very feebly 

 inflated subbasally, the usual three entire striae distinct, the fourth 

 represented at base and less distinctly at apex, the fifth also some- 

 times traceable at apex, the sutural short, obsolete before the middle 

 and at apex; flanks not striate, excepting a short fine humeral stria 

 at apex and sometimes at base and a short but stronger subhumeral 

 in basal third, the oblique humeral scarcely traceable; propygidium 

 with moderate and shallow, widely and irregularly scattered punc- 

 tures, deeper and closer on the pygidium basally but elsewhere smaller 

 and sparse; prosternal lobe broadly rounded, the mesosternal sinus 

 deep; external spines of the hind tibiae not more numerous than 

 usual. Length 5.0-5.8 mm.; width 3.75-4.5 mm. Colorado 

 (Denver) and Manitoba (Aweme) Solaris Carn. 



Legs black to piceo-rufous, uniform in color throughout; body slightly 

 more elongate than in the preceding 8 



8 Humeral stria of the elytra deep and distinct in nearly apical two- 

 thirds, very close to the first dorsal posteriorly. Body not very 

 broadly, regularly oblong-oval, convex and black, the legs black to 

 piceous; red areas of the elytra not quite reaching the sides or apex, 

 the median plaga at base extending behind the middle, nubilously 

 defined and as long as wide; head with entire and coarse ambient 

 stria; prothorax transverse as usual, feebly trapezoidal, the sides 

 feebly arcuate, more rounding apically; lateral striae coarse and deep, 

 especially the outer one, the broad intervening surface apparently 

 never having anterior rugulosity; elytra with the three entire striae 

 coarse and strong, the fourth present apically and also sometimes the 

 fifth; sutural stria fine, wanting in basal two-fifths and at apex, the 

 subhumeral represented by a short dash near the anterior limit of the 

 humeral, the oblique humeral long and distinct but fine; punctures of 

 the propygidium rather coarse and widely separated, those of the 

 pygidium not quite so large but deeper, moderately separated; sterna 

 as in the preceding, the prosternal lobe not so broadly rounded. 

 Length 5.7-6.0 mm.; width 3.8-4.0 mm. New Mexico to Wyoming 

 (Laramie) ulkei Horn 



Humeral stria obsolete, traceable only by a short dash near the middle 

 and sometimes a few very fine widely separated traces posteriorly. 

 Body more broadly oblong-oval than in ulkei, the coloration through- 

 out similar, except that the nubilous black elytral plaga extends less 

 posteriorly and is not quite as long as wide, not broadened posteriorly 

 as it is in Solaris; head and mandibles sparsely and very minutely 

 punctulate, the ambient stria entire but finer than usual; prothorax 

 as in the preceding but broader; outer stria coarse and entire, the 

 inner finer and not attaining the base, the intermediate surface 

 perfectly smooth, though with the usual extremely minute sparse 



T. L. Casey, Mem. Col. VII, Nov. 1916. 



