28 NatTurRAL History BuLueEtTIn. 
prothorax and elytra, as in B. virginie@, but the humeri are 
acutely pointed, the pubescence is coarser and not so dense. 
Length, 1.8mm. Plate X., Fig.93a. Plate XII., Fig. 137. 
@ head wider than long, eyes small, vertex elevated above 
the eyes, laterally carinate, flat above, occipital fovee large, 
pubescent, mutually twice as distant as either from the eye; 
circumambient sulcus feeble, enclosed surface, and that 
behind the sulcus convex; occiput carinate; supra-antennal 
elevation punctured, frontal margin depressed and emargi- 
nate in the middle, the lateral, pendant, lobes setose; from 
the lower part of the emargination emerge two small shin- 
ing teeth, below which, and separated by the interantennal 
excavation on the clypeus, rises an elongated tubercle bearing 
two tufts of hair; the sides of the clypeus are reflexed, sur- 
face below the tubercle conical, with a triangular depression 
each side near the tubercle; labrum constricted at the base. 
Antenne with the basal joint triangular, carinate above, emar- 
ginate at the tip, the triangular pendant lobe rounded at the 
free angle; second joint two-thirds as long as the first, ob- 
conical, third shorter nearly quadrate; fourth to seventh equal, 
eighth shorter, ninth transverse, slightly cuneate internally; 
tenth large, globular; eleventh as thick as the tenth, and as 
long as the ninth and tenth together, rounded at the base, 
conical, acutely pointed at the ends. Aédomen with two short 
carine-at the base, mutually more distant than in B. virginia; 
thighs thicker, tarsi very slender, claws simple. 
? antenne regular, clypeus not separated from the simple 
frontal margin, obsoletely carinate in the middle; anterior 
margin finely retuse, entire, surface strongly punctured. 
Habitat. Virginia; Iowa. 
B. TRIANGULIFER, Brend. Shining black, densely pubes- 
cent. Elytra, marginal rounded angle of the prothorax, and 
supra-antennal tubercle, in sunlight blood-red, antenne, palpi 
and legs rust-red. Length, 2.mm. Plate X., Figs. g1 and 
oh: Plate Ril ies 233: 
flead quadrate, vertex smooth, but slightly convex, with an 
