420 Coleopterological Notices, V. 



California (Lake Tahoe). 



I took a single male only of this species, which is very distinct 

 by reason of its short and coarsely, subserially sculptured elytra. 



D. OCCidlllim n. sp. — Oblong, convex, polislied, glabrous, black, the 

 elytra with the feeblest piceo-metallic tinge ; legs piceous-black, the tibije 

 and tarsi rufescent ; antennse black throughout. Head two-thirds as wide as 

 the prothorax, nearly as in cequicoUe, minutely, sparsely punctate ; antennse 

 slender, slightly longer than the head and prothorax, very evenly, feebly 

 incrassate throughout from near the base, joints one to seven more or less 

 longer than wide, eight to ten shorter, similar in form, scarcely as long as 

 wide, increasing in size. Prothorax about twice as wide as long, the sides 

 parallel, feebly and evenly arcuate ; base and apex subequal ; basal angles 

 obtuse and narrowly rounded ; disk evenly, transversely convex, not im- 

 pressed, very narrowly explanate along the side margins, finely, rather 

 strongly and somewhat closely punctate ; sublateral fove?e before the middle 

 very feeble. Elytra toward apex nearly one-third wider than the prothorax, 

 two and one-half times as long as the latter, fully as long as wide, truncate 

 at apex, the sides feebly divergent, nearly straight ; humeri not exposed at 

 base, obliquely rounded to the prothorax, rather coarsely strongly and closely 

 punctured, with a broad deep impression along each side of the elevated 

 suture, the punctures almost evenly distributed, with very feeble subserial 

 arrangement. Abdomen with nearly three exposed segments, polislied, sub- 

 impunctate. Length 2.2 mm. ; width 1.2 mm. 



California (Siskiyou Co.). 



Allied to sequicoUe but differing altogether in the form of the 

 antennae, which are here much more slender and very feebly gradu- 

 ally and evenly incrassate throughout, also in its rather more trans- 

 verse prothorax and in the larger, more densely punctate elytra. It 

 is represented in my cabinet by a single female. 



OMALUJm Grav. 



In this difficult genus the European species have been divided 

 into several subgenera which appear to be amply valid, at least as 

 such, there being notable differences in the structure of the maxil- 

 lary palpi. The following species are to be added to those already 

 known from North America: — 



O. ater n. sp. — Narrow, convex, highly polished, intense black, the legs 

 toward tip and antennse toward base rufescent ; very narrow side margins of 

 the pronotum also feebly rufescent from diaphaneity ; pubescence excessively 

 short, remote and scarcely visible. Head barely more than two-thirds as wide 

 as the prothorax, wider than long, flat throughout above, finely, very remotely 



