Tue PsELAPHID2 OF NorTH AMERICA. 303 
Habitat. California (San Mateo Co.,) Plate IX., Fig. 17, 
antenna. 4. 
This may be identical with 2B. compar of Leconte, which is 
_ described as having similar antennz, densely punctured prono- 
tum and brown color. 
B. rumipa, Lec. Clear brownish-yellow, pubescence fine, 
very short, plentiful, appressed, elytra and dorsal surface of 
the abdomen extremely fine, punctulate. Length, 1.2 mm. 
Head, exclusive of the eyes, as wide as the length from the 
tip of the frontal margin to the base; front tubercles not 
prominent, fovee in a line through the middle of the eyes 
about four times as distant as either from the eyes, occiput 
evenly convex, frontal margin produced to a point, frontal 
fovez very small, slightly impressed on the nearly flat inter-an- 
tennal space. Antenne 4 half as long as the entire body, joints 
one to four rapidly decreasing in size, quadrate; first, one- 
half the width of the fifth; fourth, one-third of the first; fifth 
and sixth oval, longer than wide, and as wide as the length 
of the eye; seventh and ninth, gradually increasing; seventh, 
equal to fourth, and half as wide as ninth, which is slightly 
transverse; tenth, larger, not as wide as fifth or sixth, the 
last as wide as fifth, ovate, one-third longer. Clypeus and 
labrum prognathous, the latter rounded with a small fovea 
near the lateral margins. Prothorax as long as the head and 
one-third wider, evenly convex, middle fovez small puncti- 
form, lateral ones in full view from above, not much larger 
than the occipital foveee, base with a transverse row of small 
punctures. /ytra one-half longer than the prothorax and 
equal to the shoulder width; across the posterior fourth, one- 
third wider, disk evenly convex, sutural lines straight, parallel, 
interval not roof-shaped, discal lines arcuate, convergent, 
obsolete in the posterior fifth. Addomen, first segment one- 
fourth as long as the width, lateral anterior corner roundly 
depressed, carine including one-third of the segmental width. 
Legs rather long and robust. 
4. Distinguishing marks are the above mentioned form of 
