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Extracted from: Robertson, C. (1897). North American Bees - Description and Synonyms. Transactions of the Academy of Science od St. Louis. Vol. 7. No. 14.
Female - Black, fi1'8t four segments of abdomen red. Head as
broad as thorax; face closely punctured, vertex and clypeus
more sparsely punctured; occiput transversely striate; mandibles
bidentate, rufous at apex; flagellllm dull ferruginous;
me!::!ollotum and scutellum shining, with rather sparse punctures,
especially on the disc; metathorax coarsely reticulated,
disc with semicircular inclosure; wings slightly clouded,
more hyaline at base and apex; nervures and tegulae testaceous,
stigma dllll; second submarginal cell not narrowing
above; abdomen shining, almost impunctate, segments 2-4
finely and closely punctured, fifth more coarsely puuctured;
apical margins of first four segments shining and impunctate,
slightly depressed. Length 8 mm.
Male - Resembles the female; a little more closely punctured;
third joint of antennae little longer than second, fourth as long
as second and third together and equaling following joints;
inclosure of metathorax poorly defined; second submarginal
cell more narrowing above; first two abdominal segments
yellowish red, third partly so, remaining segments black.
Length 6 ll1m.
Illiuois; one d' one female specimen.
Somewhat resembles S. 1'anunculi, but is less slender, more
sparsely and finely punctured, second submarginal cell not
narrowing above, abdomen black at tip, and with secolJd segment
not depressed basally.
Reprinted with permission from: Mitchell, T.B. 1960 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.
FEMALE-Length 9 mm.; head and thorax
black, abdomen ferruginous becoming more
piceous apically; head considerably broader
than long; eyes subparallel; clypeus broad
and wry short. broadlv convex: labrum subtriangular, apical margin qdte distinctly
angulate medially, entirely black; mandibles
with a small but distinct, inner, subapical tooth,
blackish basally, apical half ferruginous; antennae black basally, flagellum becoming
brownish-piceous apically, basal segment very
short, much broader than long, 2nd and following segments with length and breadth subequal; lateral ocelli slightly nearer to each
other than to eyes; face below ocelli rather
dull, punctures coarse, deep and distinct, close
but not crowded, those below more or less obscured by the pale pubescence, supraclypeal
area slightly elevated, closely, deeply and rather
finely punctate, clypeus much more coarsely
and quite sparsely punctate; vertex between
eyes and ocelli rather dull, quite finely but
deeply and distinctly punctate, punctures
distinctly separated, hind margin becoming
rugoso-striate, cheeks above finely punctate
just back of eyes but becoming substriate posteriorly and below, lower surface relatively smooth but dull; wings lightly infuscated,
with the usual three submarginal cells, veins
mostly testaceous, stigma reddish-piceous;
tegulae brownish-testaceous, becoming rather
blackish along inner side; legs black, becoming somewhat brownish on tarsi apically;
scutum rather dull, anterior half very obscurely punctate, the median and more anterior
portion being finely rugoso-punctate, with a
rather deep median grove, posterior half more
distinctly and rather closely and coarsely
punctate, scutellum depressed medially, punctures rather fine and sparse, becoming quite
close at each extreme side; pleura coarsely
rugose anteriorly and above, becoming quite coarsely striate posteriorly and below, dorsal
,area of propodeum very short, hardly exceeding the metanoturn in length, coarsely and
completely striate, lateral faces dull, finely and
indefinitely striate anteriorly becoming more
reticulate posteriorly, the posterior face
coarsely reticulate; abdominal terga smooth
and shining, basal tergum practically impunctate, tergum 2 finely and rather closely punctate laterally but becoming nearly impunctate
medially, 3 quite uniformly, closely and very
finely punctate over most of disc, apical margin
of all segments rather broadly impressed, impunctate, yellowish-hyaline.
MALE-Length 6 mm.; head and thorax
black, abdomen entirely black, or ferruginous
basally, becoming black apically; head considerably broader than long; eyes very slightly
convergent below; clypeus broadly convex;
mandibles entirely dark; antennae black basally, flagellum somewhat more piceous, basal
segment slightly broader than long, the 2nd
and following segments nearly twice this
length, entirely simple; lateral ocelli subequally distant from eyes and each other; face only
thinly pubescence, the surface fully exposed,
punctures rather coarse and close in general,
being somewhat finer between antennae and
eyes and along apical margin of supraclypeal
area, those on clypeus quite coarse, deep and
close throughout; area above antennae dull,
coarsely and deeply punctate, punctures
crowded, becoming more distinctly separated
on vertex between eyes and ocelli, hind margin
becoming coarsely reticulate; cheeks above
reticulate, becoming more striate below, even
the lower surface being dull and substriate;
wings lightly infuscated, with the usual three
submarginal cells, veins and stigma brownishtestaceous; tegulae brownish-testaceous, becoming yellowish-hyaline anteriorly; legs black
basally, becoming somewhat more brownish on
apical tarsal segments; scutum and scutellum
shining between deep and distinct punctures,
these well separated over most of scutum, becoming somewhat finer and closer between
notaulices and tegulae, and crowded along
narrow anterior margin; scutellum very
slightly impressed medially, punctures quite
sparse on each side of this; pleura coarsely
reticulate; dorsal area of propodeum coarsely
reticulate medially, becoming more regularly
striate at extreme sides, lateral faces rather
finely and irregularly striate, becoming coarsely reticulate posteriorly, and posterior face
coarsely reticulate; abdominal terga smooth
and shining, punctures quite coarse, deep and
distinct, irregularly scattered over disc of
basal tergum, somewhat closer and more regular on 2nd and 3rd, distinctly but not widely
separated, apical margins rather narrowly impressed, entirely impunctate, concolorous
with remainder of discs; gonocoxites slightly
excavated on dorsal surface basally, gonostyli
considerably exceeding tips of penis valves,
rather robust, strongly compressed, with a
very slender, terminal, setose projection and a broad, membraneous, inner lobe. (similar to
dichrous, fig. 117).
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