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© Copyright John Ascher, 2006-2014
· 8 Bombus citrinus, Lemon Cuckoo Bumble Bee |
© Copyright source/photographer
· 7 Bombus citrinus, U, back, Maryland, Carolina County |
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© Copyright source/photographer
· 7 Bombus citrinus, U, back, Maryland, Carolina County |
© Copyright source/photographer
· 7 Bombus citrinus, U, face, Maryland, Carolina County |
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© Copyright source/photographer
· 7 Bombus citrinus, U, side, Maryland, Carolina County |
© Copyright source/photographer
· 7 Bombus citrinus, U, side, Maryland, Carolina County |
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© Copyright Laurence Packer 2014
· 7 Bombus citrinus MALE |
© Copyright John Ascher, 2006-2014
· 6 Bombus citrinus, Lemon Cuckoo Bumble Bee |
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Michael Veit · 6 Bombus citrinus, f on Allium -- |
Michael Veit · 6 Bombus citrinus, f on Allium -- |
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Elliotte Rusty Harold · 5 Bombus citrinus, Elliotte Rusty Harold |
© Copyright source/photographer
· 5 Bombus citrinus, Male, Side, Cecil County, MD |
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© Copyright source/photographer
· 5 Bombus citrinus, Male, Face, Cecil County, MD |
© Copyright source/photographer
· 5 Bombus citrinus, f, talbot, face |
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© Photographer/source
female front UGCA195892_01
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© Photographer/source
female front top UGCA195892_02
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© Photographer/source
female top UGCA195892_03
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© Photographer/source
female side UGCA195892_04
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© Photographer/source
female wings UGCA195892_05
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© Photographer/source
female rear leg UGCA195892_06
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© Photographer/source
female rear UGCA195892_07
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© Photographer/source
female rear tip UGCA195892_08
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Overview |
Reprinted with permission from: Mitchell, T.B. 1962 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 152.
FEMALE—Length 17-21 mm., breadth of abdomen 7-9.5 mm.; black, the apical tarsal segments brownish, mid and hind spurs brownish-testaceous and tegulae brownish-piceous; wings uniformly lightly infuscated, veins testaceous to piceous; vertex with a median area of rather short, yellowish pubescence, somewhat interspersed with black hairs, pubescence of head otherwise entirely black, rather short, but erect and copious; pubescence yellow, quite dense and copious but rather short on scutum, scutellum and pleura, the venter narrowly black pubescent, propodeum with some dark pubescence at sides, and scutum with a few short black hairs adjacent to a median, polished, impunctate and more or less bare area; legs black pubescent, with pale hairs only on the more apical tarsal segments; abdomen entirely black pubescent, the hairs quite dense and erect but very short; clypeus closely and finely punctate above, becoming somewhat more coarsely so medially and at sides, apical margin rather broadly shining, sparsely and minutely punctate; labrum somewhat excavated medially, with a basal, triangular protuberance on each side, apical margin quite abruptly depressed; apex of mandible with a rather deep median notch, outer surface shining, punctures exceedingly minute and sparse; malar space smooth and shining, with exceedingly minute, indefinite, rather close punctures, somewhat shorter than basal width of mandible, and one-fourth length of eye; space between lateral ocelli and margin of vertex fully twice that between ocelli and eyes, subequally distant from eyes and each other; scape very slightly more than half the length of the flagellum, segments 1 and 3 of flagellum subequal in length, considerably longer than segment 2 which is slightly broader than long; punctures of face quite close and rather coarse, becoming sparse between eyes and ocelli; vertex very closely and finely punctate medially, becoming more coarsely and sparsely so laterally; sternum 6 not protuberant, disc somewhat depressed between the quite strongly elevated lateral and apical margins, obscurely rounded apically.
MALE—Length 13-15 mm., breadth of abdomen 5-6 mm.; black, apical tarsal segments more brownish-piceous, mid and hind spurs reddish and tegulae piceous; wings lightly infuscated, veins testaceous to piceous; head largely black pubescent, with a few yellowish hairs interspersed among the black across vertex posteriorly; scutum anteriorly, tubercles and adjacent area below with copious, elongate, yellow pubescence, scutellum fringed with long yellow pubescence posteriorly; pubescence otherwise black on scutum, scutellum, pleura, propodeum and legs, with short, inconspicuous pale hairs only on the more apical tarsal segments; abdominal terga 1 and 2 with elongate, copious and erect, yellowish pubescence, with possibly some black hairs on 2 basally toward the sides, and 3 sometimes with yellowish pubescence at extreme sides, but 3 medially and 4-6 or 7 entirely black pubescent, the hairs copious, elongate and erect; clypeus very finely and closely punctate except along apical margin medially; labrum somewhat shining, with a transverse line of erect, black hairs, surface somewhat shining below, margin shallowly depressed, broadly truncate; mandibles quite short, distinctly bidentate apically, densely pubescent on outer surface toward base, the lower margin fringed with elongate, somewhat curved dark hairs; face very finely and closely punctate but becoming quite sparsely and more coarsely so above, around ocelli and across vertex; punctures of vertex medially quite close, ocelli surrounded in part by a shining, impunctate area laterally and below; malar space smooth and shining, very minutely and sparsely punctate, median length slightly less than basal width of mandibles, about one-fifth length of eyes; lateral ocelli very slightly nearer eyes than to each other, somewhat more widely removed from margin of vertex; segment 3 of flagellum considerably longer than segment 1, and this longer than segment 2 which is about as long as broad; sterna 7 and 8 and genital armature similar to variabilis (fig.134).
DISTRIBUTION — Ontario to New Brunswick, south to Alabama and Georgia, May to October.
FLOWER RECORDS — Asclepias, Pycnanthemum and Rubus. Recorded by Robertson (1929) on Blephilia, Cirsium, Trifolium, and Verbena.
HOSTS—Plath (1934) has found this Psithyrus breeding in nests of Bombus vagans and B. impatiens.
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Identification |
Extracted from: Laverty T.M., & Harder L.D., (1988). The Bumble Bees of Eastern Canada. Can. Ent. 120: 965-987.
Description. Body size of queen and male medium. Head round; malar space shorter than broad. Tongue short. Colour as in Figure 24. In some females, T1 with tufts of yellow pile on lateral margins; T3 yellow in some specimens (Fig. 24b); and both T2 and T3 black with a posterior fringe of yellow hairs in some specimens. In some males, interalar
band reduced to small black spot; in some T3 covered with black pile (Fig. 244.
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Updated: 2024-03-29 08:09:24 gmt
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