Coleopterological Notices. 461 



form of robust, arcuate, subrecumbent, scale-like hairs, rather dense, pale 

 yellowish-cinereous and very conspicuous. Head slightly wider than long, 

 subhexagonal, the sides before the eyes prominent and angulate ; epistoma 

 very broadly truncate, the truncation sinuate in the middle, the anterior 

 angles rather narrowly rounded ; surface very feebly convex, rather coarsely, 

 deeply punctate, the punctures polygonally crowded, the acute interspaces 

 granulose; upper lobe of the eyes small, slightly elongate-oval; antennae 

 robust, rather distinctly shorter than the head and prothorax, gradually, 

 feebly inorassate, second joint very short, the third clavate, longer than the 

 next two together and more than three times as long as the second, tenth 

 transverse, shorter than the ninth and rather wider than the eleventh, the 

 latter ovoidal, as long as wide. Prothorax about two-thirds wider than the 

 head and two-thirds wider than long; sides feebly convergent from base to 

 apex and rather strongly arcuate, the disk being widest slightly behind the 

 middle ; base broadly, feebly bisinuate ; apex truncate between the slightly 

 advanced acute angles ; disk transversely, evenly and strongly convex, 

 abruptly and very narrowly explanate along the lateral edges, punctured like 

 the head, the interspaces a little less granulose. Scutellum granulose and 

 dull, rather sparsely, coarsely punctate and squamulose. Elytra four-fifths 

 longer than wide, three times as long as, and, just behind the middle, about 

 one-fifth wider than the prothorax, each with nine deeply excavated abrupt 

 closely and deeply punctate grooves, the intervals flat, but very slightly wider 

 than the grooves, granulose, asperately punctate and rather densely clothed 

 with the very robust squamiform hairs, each strial puncture bearing a very 

 minute slender hair from its anterior wall. Abdomen shining, rather sparsely, 

 coarsely punctate and finely, sparsely pubescent. Hind wings rather well 

 developed, a little shorter than the elytra. 



Male. — Anterior tarsi not perceptibly dilated ; abdomen broadly, just visibly 

 impressed in the middle toward base. 



Length 5.0-5.8 mm. ; width 2.0-2.3 mm. 



California ; Texas. 



A conspicuous species, distinguishable at once by its deeply- 

 grooved elytra, pale robust and squamiform pubescence, narrowly 

 subreflexo-explanate sides of the prothorax and polygonal head, 

 with prominent angulate sides. Together with the next it consti- 

 tutes a group, comparatively isolated not only by these characters, 

 but by the very short second and greatly developed third joint of 

 the antennas. 



43 B. hydropic us n. sp.- — Very robust, oblong-oval, distinctly wider 

 behind, convex, brownish-black, dull, the pubescence in the form of very 

 short arcuate semierect robust scale-like hairs, which are moderately dense, 

 dark piceous-brown in color and not at all conspicuous. Head and antenna? 

 nearly as in sulcatus, the former yt-ry slightly more transverse, dull, rather 

 coarsely, very deeply punctate, the punctures polygonally crowded. Prothorax 



