1864.] 
401 
tured, and each having an apical white marginal fringe, which is some¬ 
times interrupted in the middle. Length 6 lines. 
Hah. —Conn., Penn., Del. Four specimens. Coll. Ent. Soc. Phila., 
and Mr. E. Norton. 
Most probably the female of G. rufitarsm Smith. It is larger than 
G. %~dentata Say, from which it differs principally by the more sudden 
angulation of the lateral margin of the last abdominal segment above, 
and by the inferior plate having the slight notch on each side removed 
further from the tip, which is consequently more elongate beyond the 
notches. 
3. C. 8-dentata, Say. 
Ccelioxys 8-dentata, Say, Long’s 2nd Exped. ii, p. 353, ^ ; Bost. Journ. Nat. 
Hist, i, p. 400, 9 • 
Female. —Head black, deeply and roughly punctured on the vertex, 
finely punctured on the face which is clothed as well as the cheeks 
with short whitish pubescence; about the base of each antenna there 
is a tuft of long yellowish hairs ] clypeus fringed with yellowish hairs; 
aiitennge black. Thorax black, deeply, roughly and somewhat densely 
punctured; a line on the anterior margin which continues down on 
the sides of the pleura and behind the fore-legs, interrupted on the 
disk above, a line over the tegulae and a spot behind them, a short line 
or two spots before the scutellum as well as its posterior margin, all of 
short white pubescence; sides of the metathorax densely clothed with 
white pubescence, the pleura and thorax beneath sparsely so; the pos¬ 
terior margin of the scutellum broadly rounded and armed on each 
side with a stout, rather acute, slightly divergent tooth ; tegulae ferru¬ 
ginous. Wings subhyaline, apical margins fuliginous; nervures fus¬ 
cous. Legs ferruginous, the coxae and sometimes the femora and tibiae 
more or less blackish; the femora beneath clothed with short whitish 
and the tarsi with short yellowish pubescence. Abdomen conical, 
black, shining, rather deeply but not densely punctured; the posterior 
margins of the five basal segments above fringed with short white pu¬ 
bescence ; the superior plate of the apical segment finely and densely 
punctured, apex lanceolate, with a slight longitudinal carina; on each 
side of the segment the margin is rather suddenly narrowed at half its 
length, forming on each side a subacute angle, from which it narrows 
to the apex which is rounded and obtuse; the lower plate is lanceolate, 
