894 
[Feeruary 
Easily distinguished by the large cordate black spot on the disk of 
the thorax, and by the whitish band of the second segment of the ab¬ 
domen above being broadly dilated on each side. 
2. E. lunatus, Say. 
Epeolus lunatus, Say, Long’s 2nd Exped. ii, p. 354, 9 (1824). 
Female .—Head black, densely punctured, those on the clypeus and 
labrum very fine, close and interspersed with larger punctures; labrum 
and a spot on the mandibles rufous) a patch of yellowish sericeous 
pubescence around the base of each antenna; occiput fringed with 
pale hairs. Antennae black, three basal joints rufous, especially in 
front. Thorax black, densely, finely and confiuently punctured; the 
disk with a longitudinal impressed line; a line over the collar almost 
encircling the tegulae and extending backwards, sometimes obliquely, 
on each side of the pleura, a line over the insertion of the wings, some¬ 
times bordering the posterior margin of the mesothorax, two short ab¬ 
breviated lines on the disk of the metathorax anteriorly, the posterior 
margin of the scutellum, the post-scutellum, and an angulated patch, 
pointed within, on each side of the metathorax, all pale yellowish ; scu- 
telluni black, subbilobate on the disk and having on each side a slightly 
divergent, stout, rather acute tooth; on each side of the post-scutellum 
a tuft of long yellowish-white hairs; tegulae rufous. Wings fusco- 
hyaline, apical margins darker. Legs rufous, clothed with very short 
silvery-white pile, especially the posterior legs and trochanters; the 
coxae, trochanters and femora more or less stained with blackish. Ab¬ 
domen opaque velvety-black, minutely punctured; basal segment pale 
yellowish, interrupted anteriorly and posteriorly, and on the disk by a 
rather large transverse triangular black spot; apical margin of the 
second, third and fourth segments pale yellowish; the fifth segment 
has on each side a triangular cinereous patch; beneath black, the 
segments sometimes obsoletely margined with cinereous. Length 5— 
lines. 
Male .—Differs from the female in having the labrum, mandibles, 
three basal joints of the antennae, the tegulae and legs mostly black, 
sometimes obsoletely tinged with rufous; the fourth, fifth and sixth 
segments of the abdomen above have their posterior margins cinere¬ 
ous ; the apical segment is narrow and rounded at tip, and silvery in 
certain lights. ( 
