THE PsELAPHID2 OF NorRTH AMERICA. 25 
the base, the transverse impression deep, the middle one the 
smallest, carinee short; the basal segment is nearly twice the 
length of the second, the lateral triangular borders of the seg- 
ments narrow. Legs long, thighs clavate, posterior tibiz 
with a long spinous process, the intermediate ones in the ¢ 
with a short process at the end. Q, frontal margin straight 
between the antennez, declivous towards the simple clypeus. 
Antenne shorter, the tenth joint rounded, obconical, little 
thicker than the ninth. 
Habitat. East of the Mississippi river. 
This species is the type of a series of forms which have the 
following characters in common: ‘The occipital fovez are 
nude, the tenth joint of the ¢ antenna, is large, globular, of 
similar form, more or less flattened beneath, and with a deep, 
sharply defined fovea near the base. The species now known 
of this group are as follows: SB. globosus, B. spretus, B. 
foveicornis, B. punctifrons. 
B. vireint®, Casey. Black, shining; elytra dark red; an- 
.tenne and legs brown, palpi lighter; pubescence abundant. 
Form as in B. denticollis. Length, 2 mm. Plate XII., Fig. 
139. 
Head \arge, quadrate, eyes small, far below the surface of 
the nearly flat vertex; occiput with a short carina, vertex with 
two small, nude fovez connected by an arcuate, slightly im-. 
pressed, sulcus. The portion of the head outside the sulcus 
is finely and densely punctured, the frontal margin slightly 
elevated in the middle; antennal portion flat, declivous in 
front, with the usual setose, lateral, dentation; the lower part 
of the declivity is produced in the middle horizontally, as a 
triangular horn, which is notched at the tip and overhangs 
the deep interantennal excavation; in the middle of the ante- 
rior margin of the clypeus is a small rounded tubercle 
crowned with two tufts of hair; the lateral margin is angular 
and slightly retuse; the posterior part of the head is impunc- 
tate. Antenne with the first joint arcuately cylindrical, twice 
as long as wide, as long as the second and third together; 
