n6 MEMOIRS ON THE COLEOPTERA 



the legs testaceous; elytra in great part rufous, black irregularly 

 along the suture arid blackish along the external margin, also around 

 the anterior fovea; at apical third there is on each a large external 

 spot more flavate and extending to the second stria, bordered an- 

 teriorly with a black fascia involving the suture, the apex largely 

 subflavate and united laterally with the external spot; darker areas 

 submetallic; head large, very nearly as wide as the prothorax and 

 wider than an elytron, with very prominent eyes, the sulci long, 

 wide, deep and parallel, extending through the epistoma and ending 

 behind the middle of the eyes; antennae long, slender, in great part 

 pale, the third joint fully three times as long as wide; prothorax 

 only a fourth or fifth wider than long, widest near apical third; base 

 much narrower than the apex; sides strongly, subevenly rounded 

 anteriorly, oblique and nearly straight behind, almost imperceptibly 

 sinuate near the obtuse but sharp angles; margins not broadly but 

 strongly reflexed; anterior impression obsolete, the posterior feeble, 

 the stria extremely fine; surface very smooth throughout, the foveae 

 small, deep, oval, very smooth and adjoining the very moderate 

 carina; elytra parallel, with barely arcuate sides, rapidly rounding 

 at the humeri, gradually parabolic behind, one-half longer than wide, 

 one-half wider than the prothorax; striae feebly impressed, coarse, 

 not quite entire, punctures very coarse, deep, separated by their 

 own diameters, those of the seventh as coarse as the others and ex- 

 tending scarcely beyond the middle, those of the other striae ab- 

 ruptly wanting in apical third; foveae near basal and apical third. 

 Length (9) 4-O mm.; width 1.45 mm. Arizona (southern). 

 [Bemb. scintillaus Hayw., nee Bates.] vinnulum Csy. 



Form nearly similar but not quite so convex, highly polished throughout 

 and deep black, with but little or no metallic lustre, the elytra each 

 with an extremely faint small external spot posteriorly, the apex 

 also nubilously and faintly pallid; under surface black, the legs dark 

 rufous, the femora piceous; head four-fifths as wide as the prothorax, 

 wider than an elytron, with prominent eyes and well developed 

 deep sulci; antennae thicker, black, piceous basally, the third joint 

 more obconic, two and one-half times as long as wide; prothorax 

 a fourth wider than long, barely visibly narrower at base than at 

 apex, widest at anterior two-fifths, the sides broadly and less strongly 

 arcuate, becoming deeply sinuate just before the angles, which are 

 prominent, right and very sharp, the base oblique laterally; margins 

 finely reflexed; surface nearly as in the preceding, the very smooth 

 foveae less deep, longer and more linear, adjoining the distinct car- 

 ina; elytra one-half longer than wide and one-half wider than the 

 prothorax, parallel, gradually parabolic behind; striae rather fine, 

 not quite entire, not distinctly impressed, the punctures rather small 

 and close-set, not comparable in any way with those of vinnulum 

 and traceable to the extreme ends of the striae; oblique terminal 

 groove of the seventh stria unusually long; foveae near two and four 

 sevenths. Length (9 ) 4.0 mm.; width 1.5 mm. Arizona (Tucson). 

 A single example, taken by the writer definitum n. sp. 



52 Prothorax not or very indistinctly narrower at base than at apex, 



