38 GEO. n. HORN. M. D. 



convex, finely punctulate with conspicuous coarser punctures intermixed. Thorxa 

 slightly longer than wide, apex and base nearly equal, sides strongly arcuate, hind 

 angles slightly divergent, basal plicaj small, disc convex, closely finely punctiilate 

 with coarse punctures very regularly intermixed and nearly as distinct in the basal 

 region as in front. Elytra a little wider at middle than the thorax, oblong oval 

 humeri broadly rounded, striate, strise not closely punctured, intervals flat, sparsely 

 punctulate. Body beneath finely closely punctulate, with coarse punctures inter, 

 mixed, those of the sides of the prothorax longer. Claws rectangularly toothed 

 from the middle to base. Length .20-.24 inch ; 5-6 mm. 



In the males of this species the thorax is nearly as wide as long. It 

 is not easy to separate this species from the entirely piceous varieties of 

 inanus, except by the very much more distinct punctuation of the thorax. 



Occurs in California and western Nevada. 



H. simplex Lee. — Form moderately robust, piceous, brownish or castaneous, 

 moderately shining, very sparselj^ clothed with short yellowish pubescence with a 

 few larger sub-erect hairs. Antennw rufo-testaceous, very little longer than the 

 head and thorax, feebly serrate. Head convex, densely punctulate with coarser 

 punctures intermixed. Thorax not longer than wide, narrower in front, sides 

 moderately arcuate, hind angles not divergent, basal strise not conspicuous, disc 

 moderately convex, densely'finely punctulate with coarser (but not large) punc- 

 tures intermixed, which become much finer posteriorly. Elytra very little wider 

 than the thorax, arcuately narrower to apex, humeri distinct, disc moderately 

 striate, the strife with coarse closely placed punctures which become finer posteri- 

 orly, intervals slightly convex, densely finely punctulate with a single series of 

 coarser punctures. Body beneath more shining than above, densely finely punc- 

 tulate with coarser punctures intermixed. Legs pale, finely punctulate. Tarsal 

 claws rectangularly dentate from the middle to the base. Length .24-. 34 inch; 

 6--8.5 mm. 



This species was originally described as black, but the color term is too 

 strong. The form is that of ciiriafiis, but longer. The thorax varies 

 here in form as also in the other species ; in some the sides are distinctly 

 arcuate, in others nearly straight except in front, the form never ap- 

 proaches that seen in transfagus^ etc. 



Occurs in the Peninsula of California, at Fort Yuma, in Arizona, ex- 

 tending to southwestern Utah. 



H. curiatus Say. — Piceous feebly shining, sparsely fulvo-pubescent, elytra 

 at basal third and elongate apical spot, legs and antenuiB rufo-testaeeous. Antennae 

 slender, feebly serrate, very little longer than the thorax. Head convex, moder- 

 ately shining, sparsely punctate. Thorax a little longer than wide, narrower in 

 front, sides feebly arcuate, basal plicae small and double, disc convex moderately 

 shining, sparsely punctate. Elytra not wider at base than the thorax, slightly 

 wider behind the humeri, then arcuately narrowing to apex, deeply striate, striae 

 punctate, intervals convex, sparsely punctulate. Body beneath piceous, shining, 

 sparsely pubescent, the punctures rather fine not closely placed, coarser at the 

 sides of prothorax. Legs pale, finely punctate and pubescent. Claws rectangu- 

 larly dentate from the middle to the base. Length .15-. 18 inch; 4-4.5 mm. 



