312 Coleopterological Notices, VII. 



sculpture stronger but not much more confused toward the sides. Length 

 16.0-21.0 mm. ; width 6.8-8.7 mm. 



California (Sta. Cruz Co.). 



This fine species can be distinguished at once from all others of 

 the cristatus group, by the unusually developed basal joint of the 

 antennae and peculiarities of cephalic sculpture ; the papillose 

 tarsal pads of the male are rather dense, the fourth joint equilatero- 

 triangular, with the spiniform hairs long toward tip. The inter- 

 coxal plate of the mesosternum is flat at the bottom, with the sides 

 broadly reflexed. The female is more elongate than the male, 

 the elytra relatively wider and longer, with feebler sculpture, this 

 being however more confused broadly toward the sides. Numer- 

 ous specimens. 



3. B. duplicatus n. sp. — Moderately stout and ventricose, shining, 

 deep black, without metallic reflection. Sead rather wide, only moderately 

 elongate, the longitudinal crest beginning anteriorly in a large simple sub- 

 frontal tubercle, expanded at the middle in a large and strongly elevated 

 double tubercle, and ending at the nuchal constriction in a strong and nar- 

 rowly rounded overhanging tubercle ; nuchal constriction very deep, its pos- 

 terior wall scarcely indented at the middle ; supra-orbital ridges strong, the 

 antennal tubercles large ; gense prominent, deeply and narrowly sinuate ; an- 

 tennae scarcely % as long as the body, slender, the basal joint stout and ob- 

 conic but rather short, not as long as the next two. Frothorax barely as long 

 as wide, inflated and rounded anteriorly, deeply sinuate behind, the sides 

 straight and subparallel in almost basal fourth, the base scarcely as wide as the 

 head, the angles right and only slightly blunt ; reflexed margins fine ; surface 

 rather convex, the impressions deep ; anterior margin only feebly double but 

 convex. Elytra strongly convex, almost evenly elliptical, not at all full at 

 base, % longer than wide, nearly 3 times as long as the prothorax and 

 2^ times as wide ; margins very narrowly reflexed ; disk coarsely and un- 

 evenly sculptured, the striae deep, with coarse and uneven punctures, alter- 

 nately more widely separated, the striae of the wider intervals partially inter- 

 rupted ; sculpture not much more confused toward the sides, the striae easily 

 traceable throughout. Length 14.0-17.0 mm. ; width 6.2-8.0 mm. 



California ( Lake Co.). 



The anterior tarsi of the male are densely papillose beneath, 

 the pads of the first and third joints small and oval, the fourth 

 without pubescence but with the spines longer toward tip. The 

 intercoxal plate of the mesosternum is flat, with abruptly and 

 narrowly reflexed side margins and the usual deep posterior 

 emargination. The female is much larger and more ventricose 

 than the male, and has the prothorax a little more obviously con- 

 stricted near the base. 



