TENEBRIONID/E 199 



nearly as in opaca but with the apical angles more acute, not blunt 

 at tip, the sides evenly arcuate, very feebly sinuate basally, the 

 basal angles very acute but not much everted except rather rapidly 

 at tip; surface coarsely, densely but irregularly punctate, not very 

 asperulate, the minute pale hairs distinct, the concave lateral part 

 more coarsely and differently punctate and rugose as usual; apex 

 much narrower than the base; elytra nearly two-thirds longer than 

 wide, at base much wider than the prothorax, and, at the middle, 

 two-fifths wider than the latter, much more gradually obliquely nar- 

 rowed in apical two-fifths than in abbreviata or opaca, the surface 

 more convex than in the former, as in opaca throughout, the longitu- 

 dinal irregular tumid lines much less distinct, broader and less 

 numerous than in abbreviata, the sides parallel and broadly arcuate, 

 the side margin acutely cariniform but not reflexed except basally, 

 not much thickened at the humeri; abdomen almost opaque, shining 

 and punctate apically; legs slender, not quite so long. Length (c?) 

 13.7 mm.; width 6. 3 mm. Colorado (Salida), \Vickham. 



servilis n. sp. 



7 Prothorax very widely reflexed at the sides throughout the length. 

 Form broad, oblong, very opaque, brownish-black, sometimes be- 

 smeared with earthy matter to a rather greater extent than opaca; 

 head rather broadly impressed transversely, finely, rather sparsely 

 punctate, with distinct pale hairs; prothorax large, very transverse, 

 fully two-thirds wider than long, fully as wide as the elytra (cf 1 ) 

 to slightly narrower (9), at apex scarcely more than three-fifths 

 as wide as at base, very deeply, circularly sinuate, the angles bluntly 

 rounded at tip; sides strongly, evenly arcuate to the tips of the apical 

 angles, converging much anteriorly, parallel and broadly sinuate 

 basally, the angles acute and obliquely prominent; surface broadly 

 and moderately convex, densely punctate but not so coarsely as in 

 opaca, the punctures asperulate, bearing each a minute and rather 

 stouter pale seta; broad lateral concavity coarsely punctato-rugose, 

 the strongly reflexed edge rather thin; elytra a third to two-fifths 

 longer than wide, the sides gradually rounding inward posteriorly 

 from slightly behind (cf ) to slightly before (9 ) the middle, obtusely 

 ogival at apex, the lobe but feebly differentiated; surface but slightly 

 and very unevenly undulated, sometimes with the usual longitudinal 

 lines distinctly suggested, the rather sparse and very minute asper- 

 ulate punctures each with the usual minute pale seta, the cariniform 

 lateral margin very evidently reflexed throughout, strongly so and 

 thickened at the humeri; abdomen alutaceous, with very minute 

 anastomosing creases, the fifth segment dull and asperulately 

 punctate, shining and strongly punctate only at apex; legs as usual. 

 Length (cf, 9) 13.9-16.0 mm.; width 7.2-8.4 mm. New Mexico 

 (Cloudcroft), Knaus immunda n. sp. 



Prothorax less widely and not quite so strongly reflexed, more narrowly so 

 anteriorly than posteriorly, the conformation as in opaca throughout. 

 Form broad and short, moreoboval than in immunda, blackish-pice- 

 ous, not quite so densely opaque but even more prone to be coated 



