Extracted from: Robertson, C. (1897). North American Bees - Description and Synonyms. Transactions of the Academy of Science od St. Louis. Vol. 7. No. 14.
Head and thorax black, first three, 01' more, segments of
abdomen red; head broad, closely and finely punctured,
clypeus black or dull ferruginous, with sparse coarse punctures,
labrum semicircular, entire, testaceous; mandibles bidentate
or simple, honey yellow or rufolls at base, black at
tips; flagellum dull ferruginous, more or less testace01l8 beneath,
mesonotum shining, sparsely and rather finely punctured,
as well as scutellum; metathorax truncate, disc short,
with poorly defined inclosure presenting rather fine irregular
longitudiual rugae; below the metathorax is reticulated, but
not coarsely so, upper part of truncation with a triangular space which is smooth and shining; wings slightly dusky,
nervures, stigma and tegulae rather dull testaceous; legs black
or dull ferruginous, abdomen shining, finely punctured
towards apex, first three segments red or yellowish red, the
remaining segments the same, or blackish. Length 5-6 mm.
Illinois; 2 ~ specimens.
This species is separated from S. mandibularis and S.
~tygius on account of its large size and the unusually short
disc of metathorax.
Extracted from: Mitchell, T. 1962. Bees of the Eastern United States, I. North Carolina Agricultural Experiment Station. 1-191.
FEMALE-Length 5.5 mm.; black, with
no greenish reflections evident; mandibles with an inner, subapical tooth; face closely punctate
in general; punctures of scutum sparse over posterior half or more of disc, becoming narrowly rugoso-punctate along anterior margin;
pleura, including hypoepimeral area, dull and
densely rugose; dorsal area of propodeum completely and rather finely striate.
DISTRIBUTION-Illinois and Colorado.
FLOWER RECORD - Pycmnthemum
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