Reprinted from: Cresson, E.T., 1878. Descriptions of new North American Hymenoptera in the collection of the American Entomological Society. Trans. Am. Entomol. Soc.7:79.
Black, opaque; head and thorax densely punc
tured, rather thickly clothed with pale pubescence, which is darker on vertex
and thorax above; sides of face, lower posterior orbits, clypeus, spot above,
labrum, mandibles except tips, scape beneath, collar, two spots on scutellum,
tubercles, a more or less large irregular mark on pleura, and tegula, yellow;
antenna black behind, scape robust, flagellum ferruginous beneath, second
joint about one-third the length of third; scutellum subbilobate, not promi
nent; wings faintly dusky at tips; legs yellow, tinged with ferruginous, coxa
at base, trochanters behind, four posterior femora at base and behind, and spot
or stripe on their tibia black: abdomen shining, black, a broad yellow band
on all the segments, that on the first deeply notched in the middle anteriorly,
the others more or less narrowed in the middle anteriorly, venter yellow.
Length .40 inch.
Hah.?California, (II. Edwards, Behrens). Three specimens. This
and the next species resemble the two preceding species in color and
ornamentation, but are distinguished at once by the second joint of
the flagellum being much shorter in proportion to the length of the
third joint.
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