26 NATURAL Hisrory 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 carinz on either 
side of the median sulcus. /ytra feebly and sparsely punc- 
tulate, humeri not acute, prominent. Addomen with the basal 
carinz approximate, femora fusiform, slender, the claws of 
the anterior ¢ tarsi cleft. 
@ antenne with the ninth and tenth joints gradually larger, 
rounded; clypeus continuously declivous with the frontal 
margin. 
Habitat. Virginia. 
B. spretTus, Lec. (B. luculentus, Casey.) Piceous-black, 
elytra often dark red; antenne brown, paler at the tip; legs 
red, palpi yellow. Length, 1.7mm. Plate X., Fig. 92. 
Hlead wider than long, wider than the prothorax, slightly 
convex, punctulate in front, smooth behind, eyes near the base, 
prominent; fovezee 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 antenna, the declivity broadly 
impressed each side, hairy, bidentate in the middle below, a 
deep and very narrow interantennal sulcus separating it from 
the clypeus which is ccnvex, granular, with simple edges simi- 
lar to those of B. scabriceps, except that it has a small tuber- 
cle near the upper edge in the middle. Labrum emarginate. 
Antenne 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; 
