Coleopterological Notices, III. Ill 



minutely, feebly, sparsely punctate. Legs rather slender, the femora moder- 

 ately robust ; basal joint of the hind tarsi slender, at least one-third longer 

 than the remainder. Length 6.0 mm. ; width 2.6-2.8 mm. 



Arizona. 



This distinct species is somewhat similar to helvinus in outline, 

 and in its pale color and rather more than ordinarly deflexed pro- 

 notum, which gives it a relatively strong longitudinal convexity. 

 It differs conspicuously from helvinus in its very coarse, sparse 

 pronotal punctuation, smaller eyes, much less robust femora and 

 shorter, more slender antennae. It is represented by four specimens. 



31 H. rotlindicollis n. sp. — Oblong-oval, rather strongly convex, 

 piceous-black throughout, the legs and antennae but slightly paler, rufescent, 

 rather strongly shining, the pubescence moderately long and dense, very 

 easily denuded. Head feebly convex, finely and somewhat densely punctate, 

 the punctures distinctly separated ; eyes moderate, separated by about their 

 own width ; antennae moderately stout, filiform, scarcely one-half as long as 

 the body, the joints distinctly obconical, twice as long as wide, the third and 

 fourth equal. Prothorax large, three-fifths wider than long, the apex very 

 strongly, rather narrowly arcuate and continuous with the sides, the latter 

 parallel and nearly straight in a little more than basal third ; base transverse, 

 the median lobe short, broadly rounded, distinct; basal angles right and 

 slightly blunt ; disk feebly explanate near the sides toward base, more 

 especially in the female, not distinctly impressed, rather finely but strongly, 

 somewhat sparsely punctate, the punctures separated by scarcely their own 

 widths, the interspaces strongly shining. Elytra rather distinctly more than 

 three times as long as the prothorax, gradually ogival in apical two-fifths ; 

 sides parallel and straight in basal three-fifths ; disk scarcely equal in width 

 to the prothorax, with feebly impressed series of small but deep, brevilinear, 

 not very close-set punctures, the intervals minutely, confusedly and moder- 

 ately closely punctured. Abdomen finely, very feebly and sparsely punctate. 

 Legs rather slender. Length 5.6-6.4 mm. ; width 2.1-2.6 mm. 



Arizona. 



In the four specimens before me there is not one entire posterior 

 tarsus, but the basal joint is slender and appears to be slightly longer 

 than the remainder. 



The fourth joint of the maxillary palpi is strongly dilated, as 

 much so as in Lobopoda, the angle at the point of support being 

 distinctly obtuse, and the apex much longer than either side and 

 rather widely open and spongiose throughout its extent. 



The strongly arcuate apex of the prothorax, rather sparse punc- 

 tuation of the pronotum and palpal structure, will readily serve to 

 identify this distinct species. The Central American emmenasto- 



