1863.] 
307 
ently punctured, somewhat clothed with pale hairs on the pleura and 
metathorax; a longitudinal dorsal line and another on each side of the 
disk, and the pleura except a small ferruginous spot on each side under 
the wings and a large one beneath both of which are sometimes obso¬ 
lete, black; scutellum subbilobate, prominent; metathorax much more 
finely punctured, black sometimes slightly stained with ferruginous. 
Wings subhyaline, apical margins clouded, with a pale lunule near the 
tip; nervures piceous. Legs slightly clothed with pale pubescence; 
coxae black tipped with ferruginous; trochanters and base of femora 
especially beneath, black, rest of the femora, the tibiae and tarsi ferru¬ 
ginous, the latter sometimes slightly obfuscated. Abdomen finely punc¬ 
tured, shining, dark ferruginous; base of the first segment above black, 
the posterior margins of the first four segments generally blackish, on 
each side of the second segment a rather small round yellow spot; 
posterior margin of the fifth segment whitish, and the lateral margins 
of the third, fourth and fifth segments slightly clothed with whitish 
hairs; beneath ferruginous, with the base of the first segment black, 
and the posterior margins of the first four or five segments generally 
blackish and slightly ciliated with whitish hairs. Length 3J—-4 lines. 
? Male. Dilfers from the female as follows:—Head entirely black, 
except the orbits of the eyes beneath near the mandibles, the anterior 
margin of the clypeus, the labrum and base of the mandibles which are 
yellow; face clothed with silvery-white pubescence; the antennae above 
are black except the apical joint which is pale ferruginous; the an¬ 
tennae beneath are ferruginous with the scape in one specimen almost 
entirely black ; the thorax is entirely black, except the tubercles and a 
faint stain on the scutellum; the legs are rather more stained with 
blackish, particularly the posterior pair; the abdomen rather darker, 
the yellowish spot on each side of the second segment above is larger 
and angular; the third segment has on each side anteriorly and im¬ 
mediately beneath the spot on the second segment a narrow yellowish 
transverse line or spot, apical segment bifid at tip. Length 3J lines. 
Hah. Mass., Conn , Penn., Del. Collection Ent. Soc. Phila., and 
Mr. Edward Norton. Four 9 , and two S specimens. r- - 
This species differs from those specimens which I have placed under 
bisignata Say, by the darker color, by the coarser punctation of the 
head and thorax, and by the absence, in the females, of the yellow spot 
