TENEBRIONID.E 143 



base and unusually feebly sinuate, the angles but little produced 

 and obtusely rounded; sides parallel, obtusely angulate and slightly 

 rounded distinctly behind the middle, thence about equally con- 

 verging and straight to apex and base; surface broadly, very mod- 

 erately convex, rather finely and sparsely but deeply and pertorately 

 punctate and with very minute punctules scattered over, the inter- 

 spaces, very feebly, transversely impressed along the base, the basal 

 margin slightly tumid behind the impression; sides rather narrowly 

 and deeply concave, strongly reflexed and deeply, transversely rugose; 

 elytra three-fourths longer than wide, parallel, with broadly and 

 evenly arcuate sides, widest at the middle, the humeri obtuse though 

 scarcely blunt, the apical lobe broad, obtuse and indistinct; surface 

 cylindrically and strongly convex, scarcely more shining, minutely, 

 rather sparsely punctate, finely, transversely creased and each with 

 several longitudinal broadly and feebly concave impressed lines, 

 separated by feeble broad convexities, the subsutural line rather 

 more acutely impressed and evident; side margin acute but not 

 extending much behind the middle, becoming gradually strongly 

 reflexed at the humeri; abdomen shining, minutely, sparsely punc- 

 tulate; legs and tarsi moderately long and slender. Length (cf) 



22. o mm.; width 9.0 mm. Colorado, Schaupp advena n. sp. 



3 Form stout, somewhat oboval, convex, alutaceous above, strongly 

 shining beneath, black or piceous-black, the elytra sometimes 

 nubilously rufescent suturally and basally; head deeply, transversely 

 impressed, rather coarsely, deeply and closely punctate before, 

 more sparsely and less coarsely behind, the impression; antennae 

 well developed, rather longer than the prothorax (cf ) ; prothoraxlarge, 

 parallel, two-fifths wider than long, three-fourths as wide as the elytra, 

 strongly, evenly rounded at the sides, the apex distinctly narrower 

 than the base, moderately and evenly sinuate, the angles but slightly 

 advanced though acute; surface rather strongly, evenly convex, 

 sometimes with the median line very obsoletely impressed centrally, 

 a transverse and feeble, sometimes medially interrupted impression 

 along the median part of the basal margin and another at each side 

 near basal and lateral fourth, frequently becoming obsolete, the 

 punctures very small but deep, very sparse, the interspaces with 

 some very minute punctules; sides abruptly, deeply concave, strongly 

 reflexed, coarsely punctate to transversely rugose; elytra one-half 

 to three-fifths longer than wide, oblong-oval, with arcuate sides, 

 obtuse posteriorly, the lobe rapidly acuminate; surface convex, 

 becoming vertical at the sides, feebly alutaceous, very minutely, 

 remotely punctate, with short deep subtransverse creases and with 

 longitudinal broadly and feebly impressed furrows separated by 

 broad and feeble convex lines, the sutural region rather depressed; 

 side margin acute, obsolete in nearly apical half, narrowly explanate, 

 becoming finely reflexed basally; abdomen shining, smooth, except 

 the very minute anastomosing creases; legs moderately long, slender. 

 Length (cf, 9) 19.0-22.0 mm.; width 9.6-11.5 mm. Arizona (Ash 

 Fork), F. H. Snow corrugans n. sp. 



