NEW NORTH AMERICAN PSELAPHID^E. 463 



The large flattened tenth antennal joint has, on the lower 

 surface and near the base, a very large deep circular perfo- 

 rate fovea. Of the species in which the tenth antennal 

 joint is enlarged in the males, there are some — for example 

 cephalotes — in which this joint, although unusually large 

 and prominent, is almost completely unmodified upon the 

 lower surface, others — virginice, denticollis, etc. — which 

 have the lower surface slightly flattened and with a small, 

 deep fovea near the base; but in no case which has come 

 under my observation is this fovea one-half so large, or the 

 joint itself so strongly flattened as in the present species. 



The two specimens indicated are males. The species 

 probably belongs near spretus Lee, which is described as 

 black. 



B. punctifrons n sp. — Moderately robust, convex, piceous-black; elytra 

 very slightly paler, rufo-piceous; legs and autennaa pale rufo-ferruginous, 

 the latter slightly darker toward base; integuments polished, impunctate; 

 pubescence rather long, sparse, flavate. 



Male — Head moderate, slightly longer than -wide, just visibly wider than 

 the prothorax; eyes moderate, convex, at their own length from the base; 

 gense strongly convergent, feebly arcuate; base broadly sinuate ; surface 

 feebly convex, very finely, feebly, arcuately carinate above the eyes; im- 

 pressed groove continuous from the base at the sides to the vertex, at which 

 point it is but slightly more feeble; foveas deep, nude, in the middle of the 

 groove; vertex coarsel_v, sparsely and feebly punctate on the antennal tuber- 

 culations, which are large and flat, declivous anteriorly, the declivity moder- 

 ate, beginning along a straight line between the antennas; apex strongly 

 roanded; declivous surface very strongly, finely and densely punctate, each 

 puncture bearing a very minute, coarse, flavate seta; apex divided from the 

 clypeus by a fine, transverse, strongly arcuate, deeply impressed groove; 

 clypeus short, broadly subangulate, obtusely angulate at the sides; surface 

 finely scabrous, conical; edges not at all reflexed; having in the middle a 

 small, f-eble tubercle which bears a tuft of rather long, erect, flavate setae; 

 antennas rather long, slender, one-fourth longer than the head and protho- 

 rax together, club strong, basal joint not modified, cylindrical, shorter than 

 the next two together, second much longer and distinctly more robust than 

 the third, joints two to seven longer than wide, eighth equal in width, nearly 

 as long as wide, ninth wider and longer, tenth similar to the ninth, dis- 

 tinctly wider and longer, slightly wider than long, inner side much shorter 

 than the outer, eleventh large, twice as wide as the tenth, ovoidal, acumi- 

 nate, nearly as long as the four preceding toge'her. Prothorax slightly longer 



