THE PsELAPHIDZ OF NortTH AMERICA. 9 
Black, with reddish antennz and legs; vertex with a fine, entire 
carina; ¢ antennz with the basal joint spinous, triangular; 
third joint in both sexes longer and stouter than the second or 
fourth; tenth obconico-globular, large, not perforate. Length 
20mm. Long Island. (B. spinifer Brend. preoccupied.) 
triangultfer, 
Black, with reddish antennz and legs; occiput carinate; ¢ basal 
joint not modified; the third longer than the second or 
fourth, very much tumefied on one side; tenth joint large, 
globular, not perforate beneath. Length 2.0 mm. Georgia. 
NIGTICANS. 
Black, with reddish antennz and legs; occiput carinate, vertex 
with a central transverse puncture; basal antennal joints in 
both sexes subequally decreasing in size; tenth long, globu- 
lar, not perforate beneath. Length 2.0 mm. New York to 
Illinois. - . - - - - - -  cephalotes. 
I, 
Posterior tibia without a terminal spur. Frontal margin 
concave. 
B. ton#, Lec. Reddish, polished, punctulate, pubescence 
thin scattered, recumbent. Length, 2.66mm. Plate X., Fig.79. 
The ead is longer than broad, occiput tumid, overlapping 
the neck; vertex declining from the occiput to the frontal 
margin and separated from the lateral and frontal margins by 
a slightly impressed circumambient sulcus. Eyes not promi- 
nent. The last palpal joint is three times longer than thick. 
Prothorax bell-shaped, widest in the middle, but little nar- 
rower at the base, with three longitudinal sulci of which the 
middle one is nearly entire and ends near the base in a small 
fovea. Between this fovea and each side of the median sulcus 
is a small, acute tubercle; the sides of the prothorax outside 
of the lateral sulci are depressed, and the space between the 
lateral and median sulci is smooth, not carinate. lytra 
punctulate, pubescent, with low rounded shoulders; dorsal 
lines abbreviated before the middle, more deeply impressed at 
the base; sutural interval impressed. Addomen very convex, 
slightly depressed at the base, punctured, pubescent. Anfen- 
ne not half as long as the body; joints first to eighth grad- 
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