26 Natural History Bulletin. 



second slightly thicker and longer than the third; the succeed- 

 ing joints, to the ninth, are equal, quadrate, the ninth slightly 

 obconical, transverse; the tenth is large, globular, not com- 

 pressed, and with a basal fovea; eleventh as wide as the 

 tenth and as long as the three preceding joints, obliquely 

 acuminate. Prothorax longer than wide, median sulcus near- 

 ly reaching the neck, lateral foveee large, pubescent, basal 

 tubercles acute, anteriorly continued as feeble carince on either 

 side of the median sulcus. Elytra feebly and sparsely punc- 

 tulate, humeri not acute, prominent. Abdomen with the basal 

 carinae approximate, femora fusiform, slender, the claws of 

 the anterior 3 tarsi cleft. 



$ antennae with the ninth and tenth joints gradually larger, 

 rounded; clypeus continuously declivous with the frontal 

 margin. 



Habitat. Virginia. 



B. SPRETUS, Lcc. (i?. luciilentus^ Casey.) Piceous-black, 

 elytra often dark red; antennie brown, paler at the tip; legs 

 red, palpi yellow. Length, 1.7 mm. Plate X., Fig. 92. 



Head wider than long, wider than the prothorax, slightly 

 convex, punctulate in front, smooth behind, eyes near the base^ 

 prominent; fove^ nude, deep, mutually twice as distant as 

 either from the eye; sulcus fine, conspicuous, but evanescent 

 anteriorly, occiput elevated, vertex lower towards the front 

 which is declivous between the antennce, the declivity broadly 

 impressed each side, hairy, bidentate in the middle below, a 

 deep and very narrow interantennal sulcus separating it from 

 the cl^'peus which is convex, granular, with simple edges simi- 

 lar to those of B. scabriccps, except that it has a small tuber- 

 cle near the upper edge in the middle. Labrum emarginate. 

 AntermcB as long as the head and prothorax together, basal 

 joint obconical, more convex beneath, and as long as the two 

 succeeding; second to eighth oblong, gradually shorter, the 

 eighth transverse; ninth longer and wider, transverse; tenth 

 large, quadrate-rounded, flattened beneath, twice the width 

 of the neck, with a circular hole in the flattened surface; 



