n6 MEMOIRS ON THE COLEOPTERA 



feebly convex, the outer impression small and extremely faint; 

 elytra two-thirds longer than wide, nearly a third to two-fifths wider 

 than the prothorax, the sides distinctly and broadly arcuate, the 

 apex strongly rounded; striae fine, the intervals broad and flat; 

 tarsi rather long, the basal joint of the posterior as long as the next 

 two. Length (cf 9 ) 13.8-15.0 mm.; width 4.9-5.4 mm. California 

 (North Fork, Madera Co.); also two examples with label " Cal." 

 in the Levette collection. Seven examples ordinarius n. sp. 



Moderately stout and convex, shining, piceous-black, the elytra deep 

 black and alutaceous; head large, three-fourths as wide as the pro- 

 thorax, the impressions rather deep and closer than in any other 

 of this group, being separated by a third more than either from the 

 sides, the epistoma and labrum broadly sinuate; antennae castaneous, 

 piceous basally ; prothorax nearly a third wider than long, the sides 

 strongly rounded, converging but barely at all sinuate basally, the 

 angles obtuse but sharp though not at all prominent; base transverse, 

 four-fifths the maximum width; surface with numerous feeble wavy- 

 transverse lines, the inner impression obtusely rather deep, obsolete 

 before the base, the outer elongate, evident but feeble; elytra two- 

 thirds longer than wide, oblong-oval, rounded at tip, a third or more 

 wider than the prothorax; intervals flat, feebly convex near the 

 sides, the striae fine; hind tarsi rather slender. Length (cf 9 ) 

 13.0-14.5 mm.; width 5.0-5.4 mm. California (Lake Tahoe). 

 Four examples laborans n. sp. 



15 Form elongate, moderately convex, deep black, shining, the elytra 

 (cf) shining and only faintly, or ( 9 ) less shining and strongly, 

 alutaceous; head moderate, the impressions rather strong, lineiform, 

 diverging; antennae piceous, paler near the tip; prothorax a fifth 

 wider than long, rather strongly rounded at the sides from apex 

 to base, the sides more converging basally and straight, the angles 

 very obtuse, bluntly rounded; base somewhat arcuate, sometimes 

 with a faint median sinuation, margined only near the sides, about 

 three-fourths the maximum width; surface broadly convex, the 

 inner impression long, deep and conspicuous, the surface externally 

 thereto convex, unimpressed; lateral margins unusually broadly 

 concave and reflexed; elytra oblong-oval, rather flattened suturally, 

 two-thirds longer than wide, strongly rounded at apex, only about 

 a fifth wider than the prothorax, the striae very fine and shallow, 

 impunctate, the intervals flat; hind tarsi rather long and slender. 

 Length (cf 9 ) 12.5-14.5 mm.; width 4.8-5.0 mm. California 

 (Sta. Barbara), Dunn. Seven examples barbarinus n. sp. 



Form elongate, suboval. rather convex, polished, piceo-rufous throughout, 

 the elytra barely at all alutaceous in either sex; head moderate, the 

 impressions fine, diverging, the epistomal apex and labrum unusually 

 narrow, feebly sinuate; antennae pale, with the nude first three joints 

 darker and rufous; prothorax fully a fourth wider than long, strongly 

 rounded at the sides, which become strongly convergent posteriorly 

 and barely straight near the angles, which are very obtuse though 

 distinct, not rounded but not in the least prominent; base relatively 

 narrower than in any other of the group, feebly sinuate medially, 



