THE PsELAPHIDZ OF NorRTH AMERICA. 297 
Head with the eyes near the base, tempora short, arcuate 
to the nearly straight base, occipital fovez in a line with the 
anterior part of the eyes, large, twice their own width apart, 
inter-antennal space transversely depressed and punctured, 
containing a smaller rounded fovea, supra-antennal tubercles 
large. Antenne shorter than the head and prothorax, first 
and second joints subequal, conic-cylindrical, third to eighth 
subequal in width, fourth and seventh quadrate, equal; third, 
fifth and sixth longer than wide; ninth and tenth trapezoidal, 
transverse, eleventh a little longer than wide, obliquely pointed. 
Prothorax with the sides arcuate on the anterior third, con- 
verging to the neck and slightly so towards the base, the 
posterior part of the sides nearly straight. Base three-fourths 
as wide as the disk, the latter convex, punctulate, median 
fovea a small rounded puncture, lateral fovez pubescent, 
small. /ytra near the tip nearly twice as wide as the pro- 
thorax, the length being one-sixth less than the width; sutural 
lines parallel, discal ones arcuate, sharp. Addomen with the 
basal carine short, slightly divergent, including one-third of 
the segmental width. Posterior tibiz clavate, arcuate, in the 
male; the elytra are longer in the female, and the last ventral 
simply flattened in the middle. , 
Habitat. Western Nevada and the adjoining parts of 
California. 
B. porira, Brendel. Grayish-brown or darker, highly 
polished, impunctuate, pubescence inconspicuous, fine, sparse, 
legs and antenne dark brown. Length, 1.2 mm. 
flead very slightly vaulted on the vertex, the disk as long 
as wide, clypeus and mouth not very much protruding, eyes 
small, not very prominent, tempora rounded longer than the 
eyes, occiput evenly convex the base-line straight. Fovez 
equal, mutually three times as distant as either lateral one 
from the eye. Awfenne robust, not longer than the head and 
prothorax, the first two joints strong, sub-equal, sub-cylindrical. 
Third narrower obconical, fourth small quadrate, fifth and 
sixth a little thicker than the fourth, slightly longer than wide. 
