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Bombus melanopygus Nylander, 1848
Bombus menestriesii Radoszkowski, 1860, possible synonymy; Bombus lacustris Cresson, 1863; Bremus melanopygus var washingtonensis Frison, 1926; Bombus edwardsii Cresson, 1878; Bombus melampygus Handlirsch, 1888; Bombus lapponicus var insularis_homonym Friese, 1924

Life   Insecta   Hymenoptera   Apoidea   Apidae   Bombus
Subgenus: Pyrobombus

Bombus melanopygus FEM mm - f
© Copyright Laurence Packer 2014 · 7
Bombus melanopygus FEM mm - f

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Bombus melanopygus MALE mm - f
© Copyright Laurence Packer 2014 · 7
Bombus melanopygus MALE mm - f
Bombus melanopygus, Black-tailed Bumble Bee
© Copyright John Ascher, 2006-2014 · 6
Bombus melanopygus, Black-tailed Bumble Bee

Bombus melanopygus, f, face, san francisco, ca ---.
© Copyright source/photographer · 5
Bombus melanopygus, f, face, san francisco, ca ---.
Bombus melanopygus, Black-tailed Bumble Bee
© Copyright John Ascher, 2006-2014 · 4
Bombus melanopygus, Black-tailed Bumble Bee

Bombus melanopygus, Black-tailed Bumble Bee
© Copyright John Ascher, 2006-2014 · 4
Bombus melanopygus, Black-tailed Bumble Bee
Bombus melanopygus, Black-tailed Bumble Bee
© Copyright Sheryl Pollock 2011 · 3
Bombus melanopygus, Black-tailed Bumble Bee

Bombus melanopygus, Black-tailed Bumble Bee
© Copyright Sheryl Pollock 2011 · 3
Bombus melanopygus, Black-tailed Bumble Bee
Bombus melanopygus, Black-tailed Bumble Bee
© Copyright Sheryl Pollock 2011 · 3
Bombus melanopygus, Black-tailed Bumble Bee

Bombus melanopygus, Black-tailed Bumble Bee
© Copyright Sheryl Pollock 2011 · 3
Bombus melanopygus, Black-tailed Bumble Bee
Bombus melanopygus, Black-tailed Bumble Bee
© Copyright Sheryl Pollock 2011 · 3
Bombus melanopygus, Black-tailed Bumble Bee

Bombus melanopygus
Ron Hemberger · 1
Bombus melanopygus
Bombus melanopygus
Ron Hemberger · 1
Bombus melanopygus

Bombus melanopygus, back
Ron Hemberger · 1
Bombus melanopygus, back
Bombus melanopygus
Hartmut Wisch · 1
Bombus melanopygus

UGCA195880 01.queen_front.320.jpg
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male front
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male rear
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Identification
Extracted from Bumble Bees and Cuckoo Bumble Bees of California by Thorp, R. (1983).

Bombus melanopygus edwardsii
Discussion. B. edwardsii belongs to the group of species which includes A. melanopygus, mtxtus, sitkensb, and sytvicola, and is most closely related to 5. melanopygus. It differs from melanopygus in having black, not red, hairs on metasomal terga 2 and 3. In color pattern, J?, edwardsii most closely resembles £. bf/arius ("nearcticus" populations) and mtxtus. It differs from btfartus in having the scutellum entirely yellow and not interrupted by a broad V-shaped notch. It differs from mtxtus females in having black hair on the last two tergites instead of reddish or golden hairs. The males are easily separated, because the males of mixtus have unique brush-like fringes of hair on the inner faces of the basal antennal flagellomeres. This species is remarkably uniform in color pattern, but may intergrade with B. melanopygus (see discussion under that species). We have encountered 5 nests of this species. Three taken in Berkeley and El Cerrito were above ground (1.8 to 12.2 m) in old bird nests. Two oth¨ers (near Pope Valley, Napa Co., and near Santa Margarita, San Luis Obispo Co.) were underground in old rodent burrows. Nest associates included Vobtcetta larvae (Syrphidae) (Pope Valley) and Cratldus adults (Tenebrionidae) (Santa Margarita), the latter probably only incidental.


Bombus melanopygus
Discussion. B. melanopygus belongs to the group of species which includes B. edwardsii* mixtus, sitkensis, and sytvkota* and is most closely related to B. edwardsii. It differs from edwardsii in having red instead of black hair on metasomal tergites 2 and 3 and usually having black instead of yellow hair on tergites 4 and 5. In color pattern it looks most like B. huntii and the Great Basin color form of California B. syivi-cola. It differs from both in having black hairs intermixed among the yellow hairs of the anterior scutum, which give the area a clouded appearance. The principal color variation occurs in the amount of yellow hair replacing the black hair on metasomal tergites 4 and 5. An increase in yellow on these tergites is often accompanied by a decrease in the number of black hairs intermixed on the anterior scutum. The resulting extreme looks like an edwardsU with red instead of black hair on tergites 2 and 3. Occasional males of this form are found in areas where edwardsU is abun¨dant and no females of melanopygus have been taken. These two taxa may be conspecific color forms. The area of overlap, northern California and west central Oregon, between edwardsU and melano¨pygus needs to be looked at more critically for signs of intergradation. The nest biology of B. melanopygus is described by Johansen (1967) and Hobbs (1967b). Johansen (1967) found 11 of 14 colonies in surface nest boxes, which coincides with our observations on the above-ground nesting tendencies in B. edward¨sU. However, Hobbs (1967b) found four nests underground or at least with the entrance tunnel leading underground. The larvae of a sarcophagid fly, Brachkoma, fed on larvae and pupae of this bumble bee, and were considered the most destruc¨tive parasites found by Johansen (1967).

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Asteraceae  Achillea millefolium @ BBSL (1)

Anaphalis margaritacea @ BBSL (1)

Aster sp @ BBSL (2)

Carduus pycnocephalus @ BBSL (3)

Centaurea maculosa @ BBSL__JPS (1)

Centaurea sp @ BBSL (1)

Chaenactis sp @ BBSL (1)

Chrysothamnus sp @ BBSL__JPS (1)

Cirsium sp @ BBSL (4)

Cirsium @ AMNH_BEE (1)

Coreopsis grandiflora @ BBSL (1)

Erigeron speciosus @ BBSL (3)

Layia platyglossa @ BBSL (1)

Leucanthemum √ósuperbum @ BBSL (1)

Microseris nutans @ BBSL (2)

Senecio integerrimus @ BBSL (2)

Silybum marianum @ BBSL (1)

Taraxacum officinale @ BBSL (3)

Wyethia sp @ BBSL (1)

Wyethia @ AMNH_BEE (4)
Berberidaceae  Berberis aquifolium @ AMNH_BEE (1)

Mahonia aquifolium @ AMNH_BEE (3)
Boraginaceae  Eriodictyon @ AMNH_BEE (8)

Myosotis laxa @ BBSL (6)

Phacelia @ AMNH_BEE (2)
Brassicaceae  Erysimum 'Bowles @ I_LKD (2)

Erysimum sp @ BBSL (1)

Sisymbrium officinale @ BBSL (1)
Caprifoliaceae  Lonicera @ AMNH_BEE (3)

Symphoricarpos albus @ BBSL (2)

Symphoricarpos sp @ BBSL (1)
Caryophyllaceae  Arenaria capillaris @ BBSL (1)

Arenaria congesta @ BBSL (1); BBSL__MOSCOW (1)
Clusiaceae  Hypericum perforatum @ BBSL (1)
Crassulaceae  Sedum divergens @ BBSL (1)
Ericaceae  Arctostaphylos columbiana @ BBSL (1)

Arctostaphylos sp @ BBSL__JPS (1); BBSL (8)

Arctostaphylos @ AMNH_BEE (2)

Gaultheria shallon @ BBSL (2)

Phyllodoce empetriformis @ BBSL__MOSCOW (1)

Rhododendron macrophyllum @ BBSL (1)

Rhododendron sp @ BBSL__JPS (1)
Fabaceae  Astragalus sp @ BBSL (1)

Cercis occidentalis @ BBSL__JPS (3)

Lathyrus sp @ BBSL (3)

Lotus nevadensis @ BBSL__KWC (2)

Lupinus sp @ BBSL (47)

Lupinus @ AMNH_BEE (1)

Melilotus albus @ AMNH_BEE (7)

Trifolium hirtum @ BBSL (1)

Trifolium repens @ BBSL (12); AMNH_BEE (8)

Trifolium sp @ BBSL (25)

Vicia sp @ BBSL__OS (1)

Vicia @ AMNH_BEE (10)
Grossulariaceae  Ribes sanguineum @ AMNH_BEE (1)

Ribes @ AMNH_BEE (2)
Herndon, j.d.  1348 @ JRYA__OLYM (1)

1476 @ JRYA__OLYM (2)

1487 @ JRYA__OLYM (3)

1537 @ JRYA__OLYM (1)

1844 @ JRYA__OLYM (2)
Hydrophyllaceae  Eriodictyon californicum @ BBSL (3)

Phacelia leptosepala @ BBSL (1)

Phacelia sp @ BBSL (3)
Lamiaceae  Lavandula @ I_UCD (2)

Mentha sp @ BBSL (1)

Monardella @ AMNH_BEE (1)

Nepeta cataria @ BBSL (2)
Liliaceae  Calochortus subalpinus @ BBSL (1)
Oleaceae  Syringa @ AMNH_BEE (1)
Onagraceae  Clarkia sp @ BBSL (1)

Epilobium angustifolium @ BBSL (33)

Epilobium latifolium @ BBSL (1)

Epilobium parviflorum @ BBSL (3)

Epilobium sp @ BBSL (1)
Polygonaceae  Eriogonum sp @ BBSL__JPS (1)
Primulaceae  Dodecatheon alpinum @ BBSL (3)

Dodecatheon pauciflorum @ BBSL (3)
Ranunculaceae  Ranunculus sp @ BBSL (1)
Rhamnaceae  Ceanothus sp @ BBSL (6)

Ceanothus @ AMNH_BEE (4); I_UCD (1)
Rosaceae  Cercocarpus @ AMNH_BEE (1)

Malus @ AMNH_BEE (1)

Potentilla sp @ BBSL (1)

Rosa sp @ BBSL (1)

Rubus allegheniensis @ BBSL (2)

Rubus discolor @ BBSL (15)

Rubus parviflorus @ BBSL (3)

Rubus sp @ BBSL (7)

Spiraea douglasii @ BBSL (11)
Rykken, j.  1281 @ JRYA__NOCA (2)

1322 @ JRYA__NOCA (2)

1487 @ JRYA__OLYM (2)

1501 @ JRYA__OLYM (1)

1509 @ JRYA__OLYM (4)

1511 @ JRYA__NOCA (1)

1527 @ JRYA__OLYM (1)

1535 @ JRYA__OLYM (3)

1545 @ JRYA__OLYM (1)

1559 @ JRYA__OLYM (1)

1670 @ JRYA__OLYM (1)

1745 @ JRYA__NOCA (7)

1871 @ JRYA__NOCA (5)

1934 @ JRYA__OLYM (1)
Salicaceae  Populus tremuloides @ BBSL (1)

Salix @ AMNH_BEE (2)
Sarraceniaceae  Darlingtonia @ AMNH_BEE (1)
Scrophulariaceae  Buddleia davidii @ I_LKD (1)

Castilleja miniata @ BBSL (1)

Chionophila tweedyi @ BBSL__MOSCOW (1)

Collinsia heterophylla @ BBSL (2)

Digitalis purpurea @ BBSL (2)

Pedicularis groenlandica @ BBSL (7)

Penstemon confertus @ BBSL (2)

Penstemon rydbergii @ BBSL (2)

Penstemon sp @ BBSL (5)
Solanaceae  Solanum sp @ BBSL (3)
_  Fabaceae sp @ BBSL (1)

Withheld @ BBSL__YOSE (124); BBSL (446); BBSL__ZION (28); BBSL__PINN (47)

salvia @ I_LKD (2)

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CalPhotos     Photo Database

 

Number of matches : 6
Query: SELECT * FROM img WHERE ready=1 and taxon like "Bombus melanopygus%" and (lifeform != "specimen_tag" OR lifeform != "Animal") ORDER BY taxon

Click on the thumbnail to see an enlargement

Bombus melanopygus
Bombus melanopygus
Orange-rumped Bumblebee
ID: 0000 0000 1207 0423 [detail]
© 2007 Gary McDonald

Bombus melanopygus
Bombus melanopygus
Orange-rumped Bumblebee
ID: 0000 0000 1207 0422 [detail]
© 2007 Gary McDonald

Bombus melanopygus
Bombus melanopygus
Orange-rumped Bumblebee
ID: 0000 0000 1207 0424 [detail]
© 2007 Gary McDonald

Bombus melanopygus
Bombus melanopygus
ID: 0000 0000 0708 0047 [detail]
© 2008 Joel Ledford

Bombus melanopygus
Bombus melanopygus
Orange-rumped Bumblebee
ID: 0000 0000 1209 1699 [detail]
© 2009 Gary McDonald

Bombus melanopygus
Bombus melanopygus
Orange-rumped Bumblebee
ID: 0000 0000 1209 1700 [detail]
© 2009 Gary McDonald

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