378 MEMOIRS ON THE COLEOPTERA 



velvety effect, the erect hairs extremely short, cinereous, not -dis- 

 tinctly visible in canescens, the prothorax with a few stiff erect 



black hairs at the sides; elytra black at the apices 1 1 



II Erect hairs of the elytra distinct by oblique light, though short, 

 the cinereous vestiture everywhere extremely dense, even through- 

 out the median parts of the pronotum, which are glabrous in canescens. 

 Body subcylindric, pale reddish-brown; head rather closely cinereo- 

 pubescent, the antennae densely cinereous beneath throughout, 

 annulate only above, the three basal joints densely cinereous and 

 with erect black bristles; prothorax one-half wider than long, the 

 sides rather abruptly prominent medially, the spots distinct, the 

 umbo somewhat abruptly elevated but not very distinctly and 

 with its sides not rounded but medially angulate and prominent; 

 elytra rather strongly but not closely punctate; under surface and 

 legs very densely cinereo-pubescent. Length (cf) 9.8 mm.; width 



3.25 mm. Colorado vestitus n. sp. 



Erect hairs of the elytra excessively short, scarcely discoverable even by 

 oblique illumination; cinereous vestiture nearly wanting on the tho- 

 racic umbo; antennae not cinereous beneath 12 



12 Form less stout, red, the prothorax sometimes black at base or at 

 base and apex; head nearly as in the preceding; antennae blacker, 

 the three basal joints subsimilarly clothed; prothorax nearly similar 

 in form, the four velvety spots relatively larger, the median region 

 shining, sparsely punctulate, somewhat convex, rather abruptly 

 sloping from its broadly angulate sides and more densely cinereous; 

 elytra with rather more inflated humeri, somewhat strongly but 

 sparsely punctate, densely cinereous throughout, densely cinereous 

 beneath, the legs sometimes faintly and subuniformly rufescent 

 (annulatus Lee.), apparently from immaturity. Length (cf 9 ) 

 8.5-12.8 mm.; width 3.0-4.3 mm. Texas (El Paso) and New Mexico 



(Jemez Springs). Very abundant canescens Lee. 



A Similar to the preceding but a little more slender, much less densely 

 cinereo-pubescent and with the elytra not red but pale yellow- 

 brown; antennae with the cinereous bands not quite so well denned 

 beneath, owing to some disseminated cinereous hairs; prothorax 

 nearly similar but much less pubescent; elytra narrower, not so 

 inflated basally, with much sparser cinereous vestiture and rather 

 sparser punctures; legs similar. Length (c/ 1 ) 10.0-10.6 mm.; 

 width 3.4-3.7 mm. New Mexico (Las Vegas Hot Springs), 



Snow fontinalis n. subsp. 



Form stouter, the size larger, brownish-red above, densely clothed with 

 cinereous hairs, which however are not quite so dense as in canescens 

 and rather sparse at the sides of the elytra from the humeri nearly 

 to the apex; head broadly, feebly concave between the antennae, 

 which are relatively shorter and stouter than in canescens, but other- 

 wise similar above and beneath; prothorax similar, except that the 

 surface medially from side to side is less pubescent, the four spots 

 smaller and the medial convexity more coarsely punctate; elytra 

 less swollen basally, more broadly and obtusely rounded at apex and 

 with the punctures less coarse and much sparser; dense vestiture 



