146 Coleopferological Notices, II L 



which is duller and densely punctured. Legs slender, moderate in length ; 

 first joint of the hind tarsi slightly longer than the last two combined. 



Male. — Third antennal joint about two-thirds as long as the fourth ; eyes 

 separated by a little more than twice their own width. 



Length 3.5-4.0 mm. ; width 1.4-1.6 mm. 



California. 



This is our smallest species, and is very distinct in its coloration 

 and sparse, coarse punctuation, as well as in antennal structure. 



The head is distinctly shining, the comparatively wide interspaces 

 of the punctures being polished. The abbreviated third joint of the 

 antennae is probably not altogether a sexual character. 



I. tenebrosa n. sp. — Elongate-elliptical, strongly convex, extremely 

 finely and densely punctate and pubescent, rather dull and subsericeous, 

 piceous-black ; legs and antennae paler. Head feebly convex, the punctures 

 densely crowded; eyes rather small; antennae filiform, moderate in length, 

 in the male scarcely more than one-half as long as the body ; joints slightly 

 shorter in the female. Prothorax about two-fifths wider than long, the apex 

 more or less strongly arcuate, and generally continuous in curvature with the 

 sides, the latter parallel and nearly straight toward base ; basal angles slightly 

 obtuse and rather distinctly rounded; base transverse, just visibly arcuate in 

 the middle ; disk very finely, extremely densely punctured, feebly impressed 

 in the middle toward base, the basal foveae broadly impressed along 'the mar- 

 gin, feeble. Elytra three times as long as the prothorax, and, at the middle, 

 about one-third wider ; sides evenly arcuate ; humeri not exposed ; apex 

 gradually acutely rounded ; disk punctured and clothed as in sericea, the two 

 subsutural lines alone distinct toward apex. Legs normal. 



Male. — Eyes separated by rather more than twice their width ; third anten- 

 nal joint slightly shorter than the fourth. 



Length 4.4-4.8 mm. ; width 1.9-2.0 mm. 



New York (near the city and at Buffalo). 



This species is quite slender, nearly similar in shape, and in its 

 extremely dense punctuation, to sericea; it differs in its much 

 smaller size, dark piceous-black color, shorter antennae, slightly 

 smaller eyes and still more decidedly in the form of the fourth joint 

 of the maxillary palpi, which is here very slender, twice as long as, 

 and not quite one-half wider than, the third, with the inner side 

 three-fourths as long as the outer and much longer than the apex, 

 the latter much less oblique and narrower than in any other species. 



I. sericea Say. — Journ. Ac. Phil. r III, p. 270. — Elongate-elliptical, rather 

 strongly, evenly convex, feebly shining, pale ochreous-flavate throughout, the 

 pubescence fine, dense, very short and subsericeous. Head dull, extremely 



