1863.] 
289 
riorly, the bands on the four following segments narrow and more or 
less squarely indented on each side posteriorly, the band on the sixth 
segment scarcely interrupted, apical segment ferruginous, bifid at tip ; 
beneath ferruginous, base of the first segment black, posterior margins 
of the segments with a darker stain; at the base of the second, third 
and fourth segments a narrow, transverse, yellowish line attenuated in 
the middle, a spot on the fifth and another on the apical segment, 
yellow. Length 4 lines. 
Hah. Pike’s Peak, one % (Coll. Ent. Soc. Philad.); Rock Island, 
Ill., one % (Coll. Benj. J). Walsh, Esq.). 
This species resembles the S of vincta Say, but differs by having 
the face densely pilose, and by the clypeus and sides of the fiice hav¬ 
ing less yellow, and in other respects. I have before me an obscure 
specimen, doubtless of the same species, from Maryland (Coll. Mr. / 
Norton), which differs from the Pike’s Peak specimen in the colors 
being less bright,—in the scutellum having two ferruginous spots,—in 
the spots on the first segment of the abdomen above being rather deeply 
and obtusely indented anteriorly, and the fuscous dot on the posterior 
margin of each spot being obsolete,—^in the transverse yellow bands of 
the following segments being more widely interrupted on the disk and 
having their outline much less distinct, those on the fourth and fifth 
segments being somewhat deeply indented on the disk anteriorly, and 
that on the sixth segment obsolete, and in the yellowish markings of 
the abdomen beneath being either very indistinct or else entirely ob¬ 
solete. 
7. N. festiva n. sp. 
Female. Head black, densely and confluently punctured, somewhat 
depressed in front; clypeus prominent; the face on each side of the 
clypeus, labrum, base of mandibles, and an irregular spot on the cly¬ 
peus, yellow. Antennae rather short; rufo-piceous, blackish above to¬ 
wards the apex, scape in front yellow. Thorax rather coarsely and 
densely punctured, black; collar, tubercles, tegulae, a transverse line 
on the scutellum which is subbilobate, a round spot on each side of the 
metathorax, and two obsolete spots on the pleura, yellow. Wings sub- 
hyaline, apical margins clouded ; nervures piceous. Legs : coxae and 
trochanters black, slightly stained with ferruginous; anterior and in¬ 
termediate femora ferruginous and black, posterior femora almost en- 
