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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 9-10 mm.; head, thorax
and legs black, abdomen f erruginous ; head
much broader than long; eyes slightly convergent
below; clypeus slightly convex, median
length somewhat less than half the
breadth; labrum somewhat broader than long,
rather evenly rounded apically; mandibles
with a distinct, inner, subapical tooth: basal
segment of flagellum very- short, somewhat
shorter than vedicel, followinn seements
somewhat longer than. broad an: ver; much
longer than segment 1 (similar to ranunculi,
fig. 114); lateral ocelli slightly nearer each
other than to eyes; entire face dull, punctures
densely crowded, slightly more coarse above
antennae than below, uniformly close, even
over clypeus; vertex roughened, with obscure
punctures where at all evident; cheeks becoming
rugoso-striate along hind margin which
is carinate, area adjacent to hypostome smooth
and shining, impunctate; scutum shining between
deep, distinct, coarse and uniformly
close punctures, with no evidence of an anterior,
median sulcus; scutum with a shallow,
median impression, shining, punctures deep,
distinct, quite sparse on each side; pleura, including
hypoepimeral area, coarsely reticulate;
dorsal area of propodeum somewhat
shorter than scutellum, coarsely rugoso-striate,
lateral faces dull, rather finely and shallowly
reticulate toward hind margin, posterior surface
rather coarsely reticulate; tegulae yellowish-
hyaline, darkened toward inner margin;
wings lightly infuscated, somewhat darker
toward apical margin, veins and stigma reddish-
piceous, 2nd submarginal cell about half
length of 3rd, receiving 1st recurrent vein at
outer fourth; legs entirely black, spurs piceous;
lower surface of front coxae bare, flattened,
shining, with minute, scattered punctures;
mid femora somewhat flattened and
dilated medially; hind basitarsi very slightly
broader at tip than at base; abdominal terga
smooth and shining, basal tergum with widely
scattered, sparse, minute punctures which are
barely visible, tergum 2 with punctures sparse
but somewhat closer than on 1, terga 3 and 4
with somewhat deeper and clos~r-punctures
over most of discs, apical impressed areas
smooth and shining, yellowish-hyaline, discal
pubescence practically absent from terga 1-3,
with only a few obscure, erect, pale hairs at
extreme lateral margins, 4 and 5 with more
copious but very thin, suberect, pale hairs.
MALE-Length 9 mm.; head, thorax and
legs black, abdomen ferruginous; head slightly
broader than long; eyes rather strongly convergent
below; clypeus rather strongly convex,
median length about half the breadth; mandibles
dark, simple; antennae entirely black,
basal segment of flagellum very short, much
broader than long, about equal to pedicel, segment
2 fully 4 times this length and the following
segments nearly twice as long as
broad; lateral ocelli subequally distant from
eyes and each other; surface of face largely
obscured by white, subappressed pubescence,
punctures beneath densely crowded, quite
coarse just below ocelli; vertex and cheeks
quite coarsely reticulate, cheeks becoming
smooth, shining and impunctate beneath on
each side of hypostome; scutum coarsely and
closely punctate, punctures crowded except
over median portion of disc posteriorly; scutellum
with a faint, median impression, punctures
close and coarse except for a very limited
area on each side of center; pleura, including
hypoepimeral area, coarsely reticulate;
dorsal area of propodeum about as long as
scutellum medially, coarsely striate or to some
degree reticulate medially, lateral faces with
a few coarse, short striations anteriorly, becoming
rather narrowly reticulate posteriorly,
and posterior face coarsely reticulate; tegulae
yellowish-hyaline, becoming darkened toward
inner margin, somewhat reddened posteriorly;
wings subhyaline basally, becoming somewhat
clouded apically, veins and stigma brownishpiceous,
2nd submarginal cell somewhat more
than half length of 3rd, receiving 1st recurrent
vein just beyond center; legs black,
spurs piceous, front coxae bare, flattened, shining,
with minute, scattered and barely visible
punctures, mid femora strongly dilated and
subangulate beneath toward base, hind tibiae
somewhat dilated apically, basitarsi rather
broadly dilated toward apex; abdominal terga
shining, with deep, distinct, rather coarse and
close punctures, these distinctly but not widely
separated, apical impressed areas entirely impunctate,
quite narrow, yellowish-hyaline on
tergum 2, somewhat darlrened on 3-5, discal
pubescence extremely short, hardly visible on
terga 1-3, those on 3 apically, and on 4-6,
more erect and elongate but still very thin,
largely pale, only a few dark hairs at apex;
genital armature similar to ranunculi (fig.
117).
TYPES - Holotype: Male, Beaufort,
N. C., April 30, 1947 (Mitchell, on Aronia)
[author's coll.] . Allotype: Dunn Loring,
Va., May 30, 1951 (K. V. Krombein)
[U.S.N.M.] . Paratypes : NORTH CAROLINA:
4 8 8, Beaufort, Apr. 20, 1947 (on
Aronia) ; 1 6, Raleigh, May 3, 1952 (on
Ilex) (both Mitchell) ; 3 8 6, Raleigh, Apr.
23, 1945, May 2, 1937 & May 3, 1946. VIRGINIA-
5 6 6, 3 P 9, Dunn Loring, May
30, 1949 & May 13 & 26, 1951 (Krombein) ;
1 P, Chain Bridge, May 21; 2 P P, Falls
Church, May 9 & 28 (both N. Banks).
Paratypes are located i n the U. S. National
Museum, the Museum of Comparative
Zoology and i n the author's collection.
This species is very similar and apparently
very closely related to ranunculi. The
differences are chiefly i n the legs. In the
female, the front coxae are flattened and
impunctate in aroniae, more convex and at
least sparsely pubescent in ranunculi, and
the mid femora are somewhat dilated
medially in aroniae, quite slender in ranunculi.
In the males the differences i n the
front coxae are quite similar to those on
the females. In addition, the mid femora in
aroniae are strongly dilated and angulate
toward the base in aroniae, while in ranunculi
they are broadly rounded; and the hind
tibiae in aroniae are rather broadly dilated
and club-shaped apically, with the basitarsus
quite strongly dilated toward apex. In
ranunculi, the hind tibiae and basitarsi are
quite slender, the basitarsi parallel-sided.
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