1864.] 
B77 
tirst segment, a narrow transverse band slightly interrupted in the 
middle and a little curved on each side of the second segment, yellow; 
the third, fourth and fifth segments have each a yellow spot on each 
side of the disk, those on the third segment the largest, quadrate and 
very slightly emarginate exteriorly, those on the fifth segment are 
small and round; remaining segment black ; ventral scopa yellowish. 
Length 3 lines. 
Male. —Idesembles the female, but differs as follows :—The clypeus, 
a transverse line immediately above .the clypeus, and the mandibles 
except tips, are yellow; the flagellum of the antennae is sometimes 
tinged with rufous in front; the femora and the tibiae exteriorly are 
sometimes vittate with blackish; the small spot on each side of the 
scutellum is sometimes wanting; the extreme sides of the third, fourth 
and fifth segments of the abdomen each with a very small yellowish 
spot, the outer margin of the dorsal spots on these three segments are 
slightly emarginate; the sixth segment is notched in the middle, with 
its apical margin narrowly yellow; apical segment sinuate or broadly 
emarginate posteriorly, with its apical margin yellow; ventral segments 
sometimes stained with ferruginous. 
Hah .— Mass., N. J., Penn., Del. One 9 and three % specimens. 
Coll. Ent. Soc. Phila., and Mr. E. Norton. 
5. A. perplexum, Smith. ^ 
AntMdium‘per'plexum, Smith, Brit. Mus. Cat. Hym. ii, p. 214, 9? (1854.) 
“ Female. Length 4 lines.—Black, the face on each side of the 
clypeus and a little above the insertion of the antennae yellow; an un¬ 
interrupted line along the margin of the vertex, an ovate spot a little 
below the insertion of the antennae, the scape and four or five basal 
joints of the flagellum ferruginous. Thorax, the margin ferruginous, 
interrupted only on the collar and on the posterior margin of the scu¬ 
tellum ; the nervures towards the base of the wings, the tubercles and 
legs ferruginous ; the wings dark fuscous. The basal segment of the 
abdomen ferruginous, having an ovate yellow macula laterally, its pos¬ 
terior margin narrowly black; the second segment has on each side a 
curved stripe nearly uniting in the middle, the stripes are tinged with 
ferruginous, the two foll’owing segments have on each side a subquad¬ 
rate macula similarly colored, the two apical segments black; the ven¬ 
tral scopa yellowish-white. 
