H4 MEMOIRS ON THE COLEOPTERA 



the latter narrower; prothorax differing greatly in form, more trans- 

 verse, over a fourth wider than long, the sides much less broadly 

 rounded, converging posteriorly in about basal half, becoming 

 slightly sinuate near the angles, which are very briefly right but 

 not prominent; base similar; surface less convex, the median sulcus 

 coarser and deeper, the inner impression rather feeble and short, 

 coming far from attaining the base, the outer slightly elongate, 

 basal, near the sides and bounded externally by a pronounced slope, 

 the intermediate surface slightly depressed posteriorly; side margins 

 similarly very fine; elytra more oblong, fully three-fifths longer 

 than wide, not distinctly wider than the prothorax, the sides broadly 

 and more feebly arcuate, the apex similarly rounded, the striae 

 very fine, scarcely modified, the intervals flat; humeral denticle 

 obsolete, the scutellar stria long; tarsi rather long and slender. 

 Length (c?) 14.0 mm.; width 5.0 mm. California (Hoopa Valley, 



Humboldt Co.) cupidus n. sp. 



Size smaller, less convex and more distinctly striate than in calif ornicus . 10 



10 Color deep black, prothorax only slightly wider than long 11 



Color rufo-piceous, the head and prothorax frequently dark testaceous, 

 the latter much shorter and more transverse, a fourth to nearly a 



third wider than long 12 



II Form moderately stout, rather shining, the elytra very slightly 

 alutaceous; head moderate, the impressions fine, feeble, oblique, 

 the epistoma and labrum feebly sinuato-truncate; prothorax much 

 more depressed than in the preceding, the sides rounded from apex to 

 base, more converging posteriorly, not sinuate near the basal angles, 

 which are minutely and denticularly prominent; sides much more 

 broadly grooved and reflexed than in californicus; inner impression 

 long and rather strong, the outer obsolete and surface convex to 

 the sides; base broadly sinuate in median three-fifths only, margined 

 thence to the sides, four-fifths the maximum width; elytra one-half 

 longer than wide to a little longer, oval, with broadly arcuate sides 

 and rounded apex, a fourth to fifth wider than the prothorax, rather 

 convex, the striae fine but deeply impressed, impunctate, the intervals 

 feebly convex, rather strongly laterad; humeral denticle obsolete. 

 Length (cf 9 ) 10.7-12.7 mm.; width 3.7-4.5 mm. California 



(Humboldt Co.). Abundant humboldti n. sp. 



Form rather slender, similar in sculpture and lustre, the elytra narrower 

 and less convex; head nearly similar, the labrum more sinuate; 

 prothorax nearly similar but less reflexed at the sides, the latter 

 with the converging sides posteriorly differing in becoming gradually 

 broadly, though only just visibly, sinuate toward the angles, which 

 are similarly sharply marked; surface with the inner impressions 

 shorter and much feebler, the outer sometimes evident as a minute 

 feeble indentation, the intermediate surface not so convex as in 

 humboldti; base similar but more truncate; elytra more elongate, 

 three-fifths longer than wide and barely a sixth wider than the 

 prothorax, oval, with feebly arcuate sides and rather strongly 

 rounded apex, ihe striae finer and much more shallow than in the 

 preceding, mpunctate, the intervals very flat throughout; legs 



