22 NATURAL History BuLueEtIn. 
Legs long, robust, the tibiz longitudinally carinate, the thighs 
below longitudinally sulcate. 
Varies in the punctuation, being sometimes very faint. 
Habitat. Pennsylvania. 
B. BistRiATus, Lec. Dark red-brown or dark piceous, pol- 
ished; legs and antenne dark red. Length, 2.1 mm. 
flead flat, as long as wide, not convex above, occiput slight- 
ly carinate, occipital foveze small, the connecting sulcus shal- 
low, the enclosed space smooth, the excluded margin broad, 
scabrous; the frontal margin is triangularly produced and con- 
tinuous with the clypeus; eyes prominent, conical. Antenne 
as long as the head and prothorax together, third to eighth 
joints equal, quadrate, ninth and tenth obconical, gradually 
larger, the last ovate, acuminate. Prothorax punctulate, the 
median sulcus obsolete, no carine. Fiytra, angulate at the 
shoulders, convex, punctured. Legs long, 4 with a spur at 
the end of the intermediate tibia. 
Habitat. Pennsylvania. 
B. FRONTALIs, Lec. Brownish-red thinly pubescent, im- 
punctate. Length, 2.4mm. Plate X., Fig. 88. Plate XII., 
Fig. 134. . 
FHlead of 2, from the apex of the triangularly produced frontal 
margin to the base, as long as the width of the head including 
the eyes; in the ¢ it is shorter and the frontal margin is 
straight between the antennez. Two small fovez between the 
eyes are connected by a sulcus running along the margin; 
vertex and occiput elevated behind, depressed toward the 
frontal margin; face, below the overhanging front, with a 
horizontal spine, and two acute tubercles on the carinated clyp- 
eus; antennal fovee small. Palpz yellow, third joint trian- 
gular. Prothorax, length and width equal, broadest before 
the middle, tri-sulcate near the base; at the posterior end of 
the groove are three fovezw, between which are two blunt 
pointed tubercles; disk smooth, not carinate. /ytva and ab- 
domen not perceptibly punctured, thinly pubescent, the former, 
