Coleopterological Notices, IV. 429 



Legs rather stout, pubescent, the femora somewhat strongly toothed. 

 Length 1. 0-8.3 mm.; width 2.5-3.0 mm. 



Southern California. My series of five specimens indicates but 

 slight variability, and the species, which is one of the largest of the 

 genus, may be readily known by the narrow, abruptly glabrous, 

 polished vittae of the elytra. 



2 O. niTOSUS n. sp. — Oval, feebly subcuneate, black, polished, densely 

 clothed with white recumbent pubescence formed of tufted hairs, intermingled 

 with short stiff sparse piceous setae, the elytra each with five subglabrous 

 vittse, the first adjoining the suture ; those of the disk fully two-thirds as 

 wide as the pubescent stripes, all more or less confusedly punctate toward 

 their lateral limits, and always unevenly and sparsely covered with tufted 

 pubescence. Head sparsely pubescent, densely so between the eyes which 

 are separated by but slightly.less than their own width ; beak short, thick, 

 straight, coarsely, rugosely punctate, rather densely pubescent in tufts through- 

 out, three-fifths to three-fourths as long as the prothorax, the antennas inserted 

 at apical third in the male, the second joint of the funicle almost as long as 

 the first. Prothorax but slightly longer than wide, strongly inflated at about 

 the middle, the base and apex subequal in the male, but the former relatively 

 narrower in the female, coarsely, closely and unevenly punctate, with a sub- 

 entire tumid impunctate line. Scutellum densely tomentose. Elytra at base 

 one-half to two-thirds wider than the base of the prothorax, slightly wider 

 behind the middle than at base, three-fourths longer than wide. Legs moder- 

 ate ; femoral teeth small, acute ; anterior tibiae obtusely strongly swollen or 

 subdentate within at the middle. Length 6.0-6.5 mm. ; width 2.4-2.6 mm. 



Arizona (Peach Springs); Texas (El Paso). 



This species is closely allied to vittatus, but differs constantly in a 

 number of structural features. The prothorax and elytra are both 

 less elongate, and the subglabrous stripes of the latter are wider, 

 indistinctly limited and always more or less pubescent; the antenna? 

 are rather more apical in insertion, the femoral teeth smaller, and 

 the anterior tibia? more strongly and angularly swollen within at 

 the middle. The size is noticeably smaller than in vittatus. Three 

 specimens. 



3 O. lllkei Horn.— Proc. Am. Phil. Soc, XIII, p. 449. 



This species is described as being moderately densely clothed with 

 pubescence, which is recumbent and composed of tufted hairs as in 

 vittatus and insignis, the vestiture paler along the middle of the 

 pronotum and elytra. The femora are minutely toothed. Length 

 (exclusive of the head) 6.5 mm. 



Lower California. A single specimen in the cabinet of Mr. Henry 

 Ulke of Washington. 



