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 4 mm.; head and thorax
black above, becoming more or less ferruginous
beneath, abdomen ferruginous basally, becoming
piceous apically; head much broader than
long, length about three-fourths the breadth;
clypeus flat, very broad and short, apical margin
about level with the suborbital line; labrum
testaceous, broadly rounded, with a
rather pronounced, median groove toward
apex; mandibles simple, elongate and slender,
testaceous basally, becoming piceous at tips;
basal segment of flagellum very slightly
broader than long, shorter than pedicel, 2nd
and following segments slightly longer; space
between lateral ocrelli considerably less than
that between ocelli and eyes; wings subhyaline,
veins and stigma brownish-testaceous,
with but two submarginal cells; tegulae kstaceous-
hyaline; face above antennae smooth and
shining, punctures very fine but deep and distinct,
well separated, interspaces slightly exceeding
diameter of punctures, those below antennae
becoming more minute, more widely
separated and obscure, becoming quite shallow,
sparse and obscure on clypeus; vertex punctured
about as upper part of face, cheeks
shining, punctures hardly visible, becoming
shining and polished below; scutum and scutellum
shining, punctures minute and quite
widely separated but distinct, more sparse on
scutellum, pleura rather dull, finely roughened,
dorsal area of propodeum rather coarsely
striate, its length about equal to that of scutellum,
lateral faces somewhat shining, obscurely
striate posteriorly; basal abdominal
terga shining, tergum 2 with rather close but
very minute punctures across base, becoming
impunctate toward the apical margin, which
is rather broadly yellowish-hyaline, terga 3
and 4 more fully punctate, punctures rather
close and very minute, apical margins quite
broadly yellowish-hyaline.
MALE-Length 4 mm.; head and dorsum
of thorax black, thorax laterally more brownish-
piceous, abdomen brownish-testaceous basally,
becoming black apically; head only slightly
broader than long; eyes very slightly convergent
below; clypeus quite strongly flattened;
mandibles testaceous, tip reddened, base
more piceous; antennae dark basally, Aagellum
pale testaceous beneath, somewhat more brownish
above, length and breadth of segments
subequal, but 1st and 2nd very slightly shorter;
lateral ocelli slightly nearer each other
than to eyes; lower portion of face somewhat
obscured by pubescence, but punctures barely
visible, fine, rather close along inner orbits
and on supraclypeal area, somewhat more
sparse on clypeus, those above antennae fine,
distinctly separated but rather close, interspaces
shining; vertex somewhat shining between
eyes and ocelli, punctures minute but
quite distinct, rather close, hind margin becoming
obscurely roughened; cheeks above
somewhat shining, very minutely and obscurely
punctate; wings subhyaline, with but 2
submarginal cells, veins and stigma brownishtestaceous;
tegulae yellowish-hyaline; legs
brownish-testaceous, tarsi somewhat more yellowish;
scutum and scutellum shining, punctures
exceedingly minute and indistinct, rather
widely separated in center of scutum, becoming
somewhat closer toward sides, those on
scutellum well separated but hardly sparse;
pleura rather smooth, only obscurely rugose
anteriorly; dorsal area of propodeum rather
broad, with a few fine and more or less incomplete
striae, lateral faces dull but rather
smooth, posterior face with a few inconspicuous
striae; abdominal terga smooth and shining,
basal tergum with a few scattered, minute
punctures across middle, 2 and 3 very
finely and rather closely punctate basally,
punctures becoming somewhat more sparse
toward the yellowish-hyaline, narrowly impressed,
apical margins which are entirely
impunctate; gonostyli (fig. 113), quite small,
bare, slender, slightly constricted at base, only
slightly exceeding penis valves.
DISTRIBUTION-Wisconsin and Michigan
to North Carolina; July to September.
FLOWER RECORDS-Robertson (1929)
records antennariae on Antennaria plantagenifolia,
Aster ericoides and Pycnanthemum
f lexuosztm.
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