292 GEO. H. HORN, M. D. 



O. cerina Lee. — Oblong oval, feebly convex, entire body and members ]iale 

 yellowish testaceous, the head slightly darker. Head smooth, impiinctate. 

 Thorax a little more than half wider than long, not distinctly narrowed in front, 

 sides feebly arcuate, obliquely trmicate at front angles, without distinct po.st- 

 apical angulation, disc moderately convex, sparsely punctate or quite smooth. 

 Elytra distinctly wider at base than the thorax, humeri rounded, umbone scarcely 

 prominent, disc indistinctly striato punctate, the punctures fine, feebly impressed 

 and not close, the sides and apex quite smooth. Abdomen .sparsely, indistinctly 

 punctate. Length .08— .09 inch. ; 2—2.2.5 mm. 



liy the table which precedes, it will be observed that two sj)ecies 

 have the sides of the elytra quite smooth, this and atrlvetitrls. In 

 the latter the underside is normally piceous, in marked contrast with 

 the upper surface. In cerina the elytral punctures, although fine, 

 are well defined and distinct, and not vague as in the other. 



Occurs in California and Arizona. 



Cji. atl'iveiltris n. sp. — Oblong oval, feebly convex, body beneath i)iceous, 

 above inile yellowish testaceous. Antennae slightly darker externally. Head 

 smooth, impunctate. Thorax a little more than half wider than long, very little 

 narrowed in front, anterior angles obliquely truncate, without post-ajiical angu- 

 lation, sides slightly arcuate, disc sparsely, finely punctate or quite smooth. 

 Elytra distinctly wider at base than the thorax, humeri obtusely rounded, um- 

 bone distinct, disc indistinctly striato-puuctate, the punctures relatively large, 

 hut very vague and indistinct, intervals wider and v^'ith an indistinct series of 

 finer punctures, sides and apex quite smooth. Abdomen slightly rugose and 

 indistinctly punctate. Legs pale yellowish testaceous. Length .06 — .08 inch.; 

 1.5 — 2 mm. 



This species varies in the punctuation of the thorax as in cerina, 

 although the punctures are never so distinct as in that species. The 

 ])unctures of the strite are larger than in cerina, but more vague. 

 Occasionally specimens are seen with a brown abdomen which might 

 be confounded with cerina, in which, however, the underside is quite 

 pale. 



Occurs in Colorado, New Mexico, Texas, Arizona and California. 



PHYIil.OTRETA Foudras. 



Head small, deeply in.sertcd in the thorax, the eyes convex and 

 prominent, front distinctly carinate between the antennae, the tuber- 

 cles obliterated. Last joint of maxillary j)alpi nearly as long as the 

 jjreceding, elongate conical. Antennae half as long as the body or 

 slightly longer, slender in some species, or gradually thicker in others, 

 in many spe(;ies different in the sexes in the form of the middle 

 joints. Prothorax alwavs broader than lonix and somewhat narrowed 



