296 NATURAL History BULLETIN. 
one-third of the segmental width and not one-fifth of the 
length, slender. ¢ elytra often covering the basal abdominal 
carine, last dorsal emarginate at tip, last ventral with a shal- 
low rounded impression. There are no variations in color in 
mature specimens, the punctuation of the prothorax in the 9 
often not as strong but evenly distributed. 
Habitat. East of the Mississippi from Canada to the Gulf. 
B. Lirorauis, Brendel. Ferruginous, impunctate, pubes- 
cence short, abundant, legs and antenne slightly paler. 
Length, 1.3 mm. 
flead with regular, short pubescence, disk of the vertex as 
long as wide, clypeus and mouth protruding, labrum quadrate, 
eyes large, prominent, tempora rounded, shorter than the eye, 
foveze equal, large, the lateral ones only twice as far apart as 
from the eye. Azf‘enne longer than the head and prothorax, 
the joints sub-cylindrical, third to seventh three times longer 
than wide, eighth quadrate, ninth and tenth obconical, as long 
as thick, the last joint proportionately wider, and twice as . 
long as thick, truncate at the base, ovate-acute. Prothorax 
polished, with a few irregularly scattered, obsolete acu-punc- 
tures laterally, sides very evenly arcuate, lateral fovez in full 
view. /ytra not so much polished, impunctate, the sides 
strongly divergent, finely and narrowly margined from the 
base all around to the tip of the suture; disk broadly convex, 
the lines sharp, not deep, sutural interval darker colored. 
Abdominal with the basal dorsal segments rather short, one- 
fourth as long as wide, carinz one-third of the length and 
including more than one-fourth of the width. Hind tibiz 
slightly arcuate, inferior surfaces somewhat flat, brush-like. 
4 last dorsal truncate, ventral with a longitudinal impression, 
not circumscribed. 
Habitat. Texas to Virginia, more common in the latter state. 
B. NEVADENSIs, Casey. Piceous-brown, punctulate, elytra 
red, legs dark brown, antenne red-brown, pubescence short, 
coarse. Length, 1.3 mm. 
