Reprinted from: Cresson, E.T., 1878. Descriptions of new North American Hymenoptera in the collection of the American Entomological Society. Trans. Am. Entomol. Soc.7:69-70.|
Form of sebrata; head and thorax blue or green
ish-blue thinly clothed with pale pubescence; sides of face, narrowed above,
clypeus except sometimes two or more black points, occasionally a spot or two
above clypeus, base of mandibles, scape beneath, a spot on each side of pro
thorax, tubercles and tegulss pale yellow; flagellum pale testaceous beneath;
wings as in sebrata; legs black with pale pubescence, the knees, and the four
anterior tibias in front yellowish; abdomen black, shining, a yellowish band
on segments 1?4. interrupted on the disk and more or less dilated and oblique
on the sides; fifth segment immaculate and fringed with pale pubescence;
apical segment testaceous; generally, the spot on each side of fourth segment
does not reach the lateral margin. Length .20?.25 inch.
%.?Face, clypeus, Inbrura, mandibles, lower posterior orbits, antenna be*
neath, two spots on prothorax, tubercles, tegula and most of four anterior lega,
yellow; abdomen with yellowish band on segments 1?3,slightly interrupted
on disk and dilated laterally on second segment; fourth segment with two
small pale spots. Length .20 inch.
Hab.?Colorado, (Ridings). Five specimens. Closely resembles
S-maculata Say, but much smaller and with clearer wings.