COLEOPTERA. 109 



polished. Abdominal segments decreasing uniformly and rather rapidly in 

 width, first as wide as the contiguous elytra; surface very convex, highly 

 polished, densely hirsute, very finely and sparsely punctulate ; transverse 

 carinae 4-cuspid, cusps equal in length, rather approximate, finely acicular. 

 Legs short, dark piceous ; first joint of the posterior tarsi scarcely one-fourth 

 as long again as the second, much shorter than the last, first four joints 

 decreasing nearly uniformly in length. 



Male. — Posterior edge of the fifth ventral segment scarcely perceptibly 

 and very broadly sinuate; sixth broadly emarginate at apex throughout its 

 width, emargination evenly rounded throughout, about ten times as wide as 

 deep. 



Female. — Unknown. 



Length 2.7 mm. 



Fort Garland, Colorado, 1. 



85. S. VilloSUS n. sp. — Form moderately robust. Pubescence long, very 

 dense, recumbent, fine, cinereous, and conspicuous. Head small, twice as 

 wide as long ; interocular surface two and one-half times as wide as the eye, 

 very slightly convex ; equally trilobed by the moderately strong sulcations ; 

 intermediate surface evenly convex, summit impunctate ; punctures rather 

 coarse, variolate, rather distant, evenly distributed ; ocular lines meeting at 

 three to four lengths in advance ; first two joints of antennae black, mandi- 

 bles fuscous at tips. Prothorax widest before the middle, where it is four- 

 fifths as wide as the head, and one-fifth narrower than long ; sides thence 

 very moderately convergent posteriorly, and very strongly sinuate ; anterior 

 margin shorter and much more arcuate than the posterior ; surface faintly 

 swollen at the sides, particularly toward the base, finely, distantly, and 

 evenly punctate ; punctures deeply impressed ; interspaces wider than the 

 punctures, convex, very highly polished ; canaliculation as in milleporus. 

 Elytra at base distinctly wider than the head ; sides rather feebly divergent 

 posteriorly, much longer than the width at base, rather strongly arcuate ; 

 together broadly, roundly, and just perceptibly emarginate behind ; suture 

 about one-third as long again as the pronotum ; surface rather strongly 

 impressed along the suture toward the base, and also feebly, longitudinally, 

 and somewhat indefinitely impressed toward the middle of the base of each 

 elytron, finely and evenly punctate ; punctures deeply impressed and very 

 seldom coalescing, much smaller toward the base ; interspaces as wide as the 

 rjunctures, convex, very highly polished. Abdominal segments decreasing 

 uniformly and rather gradually in width, first very slightly narrower than 

 the contiguous elytra ; surface broadly convex, highly polished ; finely, 

 rather sparsely, and evenly punctulate ; transverse carinae 4-cnspid, cusps 

 equal, rather approximate, finely aciculate and prominent. Legs stout, 

 piceous-black, femora black ; first joint of the posterior tarsi one-half as long 

 again as the second, distinctly shorter than the fifth, second and third sub- 

 equal, fourth very slightly shorter. 



Male — Fifth ventral segment very feebly flattened in its middle fourth 

 throughout, edge scarcely modified ; sixth segment very broadly sinuate at 



