H2 MEMOIRS ON THE COLEOPTERA 



moderately rounded anteriorly, converging, becoming feebly sinuate 

 posteriorly; base transversely truncate, four-fifths the maximum 

 width, margined laterally; surface rather depressed, very feebly 

 convex, the latero-basal impressions both distinct but unusually 

 feeble, the surface between them feebly depressed and generally 

 somewhat alutaceous; elytra three-fourths longer than wide, broadly 

 rounded at tip, about a fifth wider than the prothorax, the sides 

 broadly and feebly arcuate; striae fine, simple, not very deep, the 

 intervals nearly flat; hind tibiae (cf) with a few small and unusually 

 widely separated feeble crenules internally, the tarsi rather long, 

 the first joint as long as the next two. Length (cf 9 ) 14.0-16.0 

 mm.; width 4.7-5.2 mm. Colorado (Boulder Co., and with un- 

 recorded locality), Wyoming and Montana (Mullan the type 

 above described) ; also one with slightly more obtuse basal angles 

 labeled " California " in the Levette collection probably erro- 

 neously. Jasper House (British America) LeConte, the original 

 locality. Abundant, [inornatus Bland] protractus Lee. 



Sides of the prothorax more strongly sinuate posteriorly, becoming 

 straight and nearly parallel for a rather long distance before the 

 angles, which are sharply defined and generally right 6 



6 Form moderately slender, slightly convex, shining, the elytra only 

 very faintly alutaceous, black but sometimes pallid; head a little 

 larger than in the preceding, nearly three-fourths as wide as the 

 prothorax, the impressions distinct; epistoma and labrum feebly 

 sinuate; prothorax a fifth to fourth wider than long, the sides broadly 

 rounded except basally, the base truncate, four-fifths the maximum 

 width, the surface and impressions nearly as in the preceding; 

 elytra elongate-oval, three-fourths longer than wide, a fourth to 

 nearly a third wider than the prothorax, the sides more arcuate 

 than in protractus, less obtusely rounded at tip, the striae and 

 intervals nearly similar; hind tibiae (cf ) feebly serrulate internally, 

 the tarsi nearly similar, the basal joint not quite so long as the next 

 two combined. Length (cf 9 ) 14.5-15.8 mm.; width 5.0-5.8 mm. 

 California (Placer and Siskiyou Cos.) parens n. sp. 



Form much more slender, feebly convex, piceous-black, not very shining, 

 the elytra opaque; head well developed, the anterior impressions 

 slender, feeble and linear; prothorax rather depressed, only about 

 a sixth or seventh wider than long, the sides feebly arcuate, feebly 

 converging to the pronounced but broad basal sinus, the base trans- 

 verse, nearly five-sixths the maximum width; surface feebly de- 

 pressed toward the hind angles, the inner impression narrow and 

 feeble, scarcely attaining the base, the outer defined only by a slight 

 swelling parallel with the straight parallel part of the sides; elytra 

 fully three-fourths longer than wide, elongate-oval, with arcuate 

 sides and strongly rounded apex, fully a third wider than the 

 prothorax, the striae very fine, impunctate, the intervals flat; 

 scutellar stria short but distinct, oblique, the humeral denticle 

 minute and feeble; basal joint of the hind tarsi nearly as long as 

 the next two. Length (9) 13.0 mm.; width 4.7 mm. California 

 (Siskiyou Co.) occultus n. sp. 



