124 MEMOIRS ON THE COLEOPTERA 



slightly more ventricose than the male, shining, black, the legs 

 rufo-piceous, the elytra only a little less shining in either sex; head 

 moderate, the impressions rather deep and broadly concave, di- 

 verging; prothorax apparently a little longer than wide, the sides 

 broadly arcuate, gradually and moderately converging posteriorly, 

 becoming very feebly and rather broadly sinuate toward the angles, 

 which are but slightly obtuse, sharply marked and subprominent; 

 base very feebly sinuate, becoming feebly arcuate near the sides, 

 scarcely more than two-thirds the maximum width; surface very 

 moderately convex, rather finely reflexed at the sides, a little less 

 finely anteriorly, the stria moderate, not quite entire; the inner 

 impression broad and feeble, not extending to the base; surface 

 thence to the angles flattened; elytra long, parallel, three-fifths to 

 three-fourths longer than wide, two-fifths wider than the prothorax 

 or more, the sides broadly arcuate, rounding a little more basally, 

 the apex subacutely rounded; striae fine but rather deeply impressed, 

 finely, obscurely punctulate, sometimes rather distinctly so laterally, 

 the intervals feebly convex, rather strongly laterad, a little more 

 strongly throughout in the male than in the female; scutellar stria 

 moderate to short; legs rather slender. Length (c? 9 ) 14.0-14.5 

 mm.; width 4.7-5.4 mm. California (Lake Tahoe and Merced Cr. ; 



also from an unrecorded locality) sierranus n. sp. 



15 Form more ventricose and more convex, coloration similar, moder- 

 ately shining, the elytra more strongly alutaceous; head rather small 

 though nearly two-thirds as wide as the prothorax, the impressions 

 fine, sharply defined, straight and diverging, the labrum sinuato- 

 truncate; prothorax relatively smaller than in any other of the 

 group, evidently longer than wide, the sides rather strongly rounded, 

 converging posteriorly and becoming broadly but strongly sinuate 

 basally, almost parallel for a considerable distance before the angles, 

 which are right and sharply marked; base transverse, three-fourths 

 the maximum width; surface only feebly convex, rather abruptly, 

 deeply and narrowly concave and reflexed at the sides, less finely 

 anteriorly, the anterior angles unusually acute, only very narrowly 

 rounded at their tips; stria strong and subentire; inner impression 

 feeble, very broadly concave, the outer obsolete; base almost com- 

 pletely unmargined; elytra oval, with somewhat strongly arcuate 

 sides throughout, rather sharply rounded at apex, three-fourths 

 longer than wide, about one-half wider than the prothorax, the striae 

 rather fine, feebly impressed, wholly impunctate, the intervals 

 very feebly convex throughout, except apically, where they are 

 rather strongly convex; scutellar stria long; legs rather long and 

 slender. Length (9) 14.0 mm.; width 5.0 mm. A single example 

 without label in the Levette collection, but with scarcely a doubt 

 from California panticulatus n. sp. 



The three species spraguei, gracilior (longicollis \\ Mots.) and 

 horni, of LeConte, also belong apparently to this group, but not 

 having representatives of them at hand it is impossible to insert 

 them definitely in the above table. 



