292 NaTuRAL History BULLETIN. 
eyes; antennal tubercles somewhat oblique, the space between 
them depressed. Antenne as long as the head and prothorax, 
first and second joints obconical, nearly equal, third to seventh 
cylindrical, the fifth longer in the male; seventh quadrate, 
eighth, ninth and tenth gradually larger, obconical, the last 
ovate, truncate at the base, as long as the two preceding, two- 
thirds as wide as long. Prothorax very densely covered with 
coarse, deep punctures, lustreless, broadest in the middle, 
wider than the head and eyes; base one-half wider than the 
neck, sides sharply rounded in the middle, sinuate anteriorly, 
nearly straight behind. Disk convex, the lateral fovee large, 
not in full view from above, basal fovez small, but very con- 
spicuous. £/ytra similar to those of B. polzta, polished, as 
wide across the prominent shoulders as the prothorax, across 
the tip slightly less than one-half wider, and the suture exceed- 
ing by one-fifth the breadth of the prothorax. Disk convex, 
depressed outside of a line drawn from each shoulder to the 
outer third of the tip of each elytron. Sutural lines not 
straight, interval roof-shaped, discal lines more widely sep- 
arated near the shoulders, then convergent or parallel, with a 
short divergence near the tip. Basal punctures three, approx- 
imate. Abdomen short, narrower than the tips of the elytra, 
the carinz including one-fifth of the surface, slightly divergent. 
Legs simple, slender. ¢ with the intermediate coxe acute, 
last ventral with the usual impression. 
Varies in the color of the elytra, which are reddish-brown 
in some (probably immature) specimens. 
Habitat. Sea-coast of the Northern Atlantic States. 
Region of the Great Lakes. 
B. coNGENER, Grendel. Pale brownish-yellow throughout, 
impunctate, lustreless (on account of the short, appressed, 
tomentose pubescence). Abdominal carine divergent, very 
short, including one-sixth of the basal width. Length, 1.1 
mm. Plate IX., Fig. 61. 
Head with the occipital fovez circular, separated from the 
eyes by a distance equal to their own width, and mutually 
