1 88 MEMOIRS ON THE COLEOPTERA 



elytra each with a large nubilous oval external area, near the apex, 

 of a pale flavo-rufous tint; under surface rufous, the legs more fla- 

 vate; head three-fifths as wide as the prothorax, the strides distinct, 

 the eyes moderate, prominent; antennae piceous, paler basally, two- 

 thirds as long as the elytra; prothorax nearly one-half wider than 

 long, widest but slightly before the middle; base very much wider 

 than the apex; sides strongly rounded, briefly sinuate at the sharp 

 and rather prominent angles, the carina very short, not distinct; 

 margins distinctly reflexed; three subbasal punctures large, deep, iso- 

 lated and conspicuous; foveae very small; elytra barely one-half 

 longer than wide, two-fifths wider than the prothorax, gradually ob- 

 tusely ogival in apical two-fifths; sutural stria fully attaining the 

 base, the abbreviated second and third almost equally impressed, 

 the fourth and fifth traceable; foveae near two and four sevenths. 

 Length 1.6-2.0 mm.; width 0.75-0.9 mm. Valley of the Rio Grande 

 from Brownsville to El Paso gaudens n. sp. 



Body still smaller and much narrower, similar in coloration and in the 

 very polished lustre; head similar, actually though not relatively 

 smaller, the antennae evidently shorter and fusco-testaceous in color, 

 three-fifths as long as the elytra; prothorax similar but somewhat 

 shorter, the three isolated subbasal punctures not so large or deep; 

 elytra relatively longer, fully one-half longer than wide, gradually 

 parabolic in outline from slightly behind the middle, a third wider 

 than the prothorax; striation as in gaudens. Length 1.6-1.65 mm.; 

 width 0.68 mm. Texas (Waco and Austin) fracta n. sp. 



22 Form much more elongate than in the preceding subsection and 

 rather less strongly convex, polished, piceo-rufous; under surface 

 rufous, the legs more flavate; head nearly two-thirds as wide as the 

 prothorax, the anterior strides faint; eyes moderate in size and 

 prominence; antennae rather long and compressed, fusco-testaceous, 

 two-thirds as long as the elytra; prothorax two-fifths wider than 

 long, widest at two-fifths from the apex, the latter evidently, though 

 not greatly, narrower than the base; sides moderately rounded 

 anteriorly, feebly oblique in about basal half, very slightly sinuate 

 near the angles, which are right and sharp; margins moderately re- 

 flexed; three isolated subbasal punctures distinct, but relatively 

 smaller than in the preceding subsection; foveae moderate, the carina 

 distinct but obtuse; elytra slightly more than one-half longer than 

 wide and almost one-half wider than the prothorax, parallel, ob- 

 tusely parabolic at tip, perfectly uniform in coloration; sutural stria 

 not quite attaining the base, the second and third distinct, the fourth 

 and fifth traceable, all the striae faintly and irregularly subpunctu- 

 late; foveae adhering to the third stria as usual and at two and four 

 sevenths. Length 2.35-2.6 mm.; width 1.0-1.05 mm. Pennsyl- 

 vania and Indiana. Not very abundant tripunctata Say 



Form less elongate, more oval, more convex, the sides of the prothorax 

 more evenly rounded; each elytron with a nubilous paler area exter- 

 nally behind; color rufo-castaneous; under surface and legs rufous; 

 head but little more than half as wide as the prothorax, the eyes 

 moderate; antennae fusco-testaceous, two-thirds as long as the ely- 



