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Bombus flavifrons Cresson, 1863
Bombus alaskensis Ashmead, 1902; Bombus dimidiatus Ashmead, 1902; Bombus flavifrons var veganus Cockerell, 1903; Bombus (Bombus) ambiguus Franklin, 1911; Bremus pleuralis var clarus Frison, 1926

Life   Insecta   Hymenoptera   Apoidea   Apidae   Bombus
Subgenus: Pyrobombus

Bombus flavifrons, female, face
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, female, face

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Bombus flavifrons, female, side
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, female, side
Bombus flavifrons, female, top
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, female, top

Bombus flavifrons, female, wing
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, female, wing
Bombus flavifrons, female, face
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, female, face

Bombus flavifrons, female, side
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, female, side
Bombus flavifrons, female, top
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, female, top

Bombus flavifrons, female, wing
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, female, wing
Bombus flavifrons, male, face
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, male, face

Bombus flavifrons, male, side
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, male, side
Bombus flavifrons, male, top
Smithsonian Institution, Entomology Department · 9
Bombus flavifrons, male, top

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

Bombus flavifrons
© Copyright John Ascher, 2006-2014 · 6
Bombus flavifrons
Bombus flavifrons
© Copyright John Ascher, 2006-2014 · 6
Bombus flavifrons

UGCA195812 01.queen_front.320.jpg
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queen front
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UGCA195812 02.queen_front_top.320.jpg
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queen front top
UGCA195812_02

UGCA195812 03.queen_top.320.jpg
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queen top
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UGCA195812 04.queen_side.320.jpg
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queen side
UGCA195812_04

UGCA195812 05.queen_rear.320.jpg
© Photographer/source
queen rear
UGCA195812_05
UGCA195812 06.queen_rear_tip.320.jpg
© Photographer/source
queen rear tip
UGCA195812_06

UGCA195983 01.male_front.320.jpg
© Photographer/source
male front
UGCA195983_01
UGCA195983 02.male_front_top.320.jpg
© Photographer/source
male front top
UGCA195983_02

UGCA195983 03.male_top.320.jpg
© Photographer/source
male top
UGCA195983_03
UGCA195983 04.male_side.320.jpg
© Photographer/source
male side
UGCA195983_04

UGCA195983 05.male_rear.320.jpg
© Photographer/source
male rear
UGCA195983_05
UGCA195983 06.male_rear_tip.320.jpg
© Photographer/source
male rear tip
UGCA195983_06

UGCA195985 01.worker_front.320.jpg
© Photographer/source
worker front
UGCA195985_01
UGCA195985 02.worker_front_top.320.jpg
© Photographer/source
worker front top
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UGCA195985 03.worker_top.320.jpg
© Photographer/source
worker top
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UGCA195985 04.worker_side.320.jpg
© Photographer/source
worker side
UGCA195985_04

UGCA195985 05.worker_rear.320.jpg
© Photographer/source
worker rear
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UGCA195985 06.worker_rear_tip.320.jpg
© Photographer/source
worker rear tip
UGCA195985_06
Overview
Extracted from Jonathan Koch, James Strange,Paul Williams.2012. Bumble Bees of the Western United States. A product of the U.S. Forest Service and the Pollinator Partnership with funding from the National Fish and Wildlife Foundation

Status: Common

Select food plant genera: Epilobium, Vicia, Trifolium, Penstemon, Geranium, Lathyrus

Tongue Length: Long

Distribution: Pacific coastline west to the Colorado Rocky Mountains, associated primarily with high elevations in the Intermountain West; dark form (B. flavifrons dimidiatus) found in western portions of the range; red form (B. flavifrons flavifrons) in eastern portions of the range

Can be confused with B. centralis and B. sitkensis

Females (queens and workers, colors refer to ‘hair’)

Thorax with black and yellow hair intermixed especially anteriorly, T1-2 yellow at least apicolaterally, T3-4 red or black, T5 black sometimes with yellow apically.

Mid leg basitarsus with the distal posterior corner rounded. Cheek length longer than broad. Hair of the face and top of head with black and yellow intermixed. On the side of the thorax, the lower anterior surface with long yellow hairs, corbicular fringes black with red admixture along posterior margin. Hair length long and uneven.


Identification
Extracted from Bumble Bees and Cuckoo Bumble Bees of California by Thorp, R. (1983).


Discussion. B. flavifrons belongs to the group of species which includes B. caliginosus, centralis, and varufykeiy and is most closely related to B. centralis. In California, it differs from centralis in having predominantly black instead of red hair on metasomal tergites 3 and 4, and in the admixture of black to the yellow hair on the anterior scutum. Males of B. flavifrons in California may have yel¬low hairs on much of tergites 3 and 4, thus resem¬bling faded males of centralis or yellow males of vandykei. They can be separated from both by the presence of some black hairs basally on tergites 3 and 4. The California color form ("cHmidiatus" popula¬tions) exhibits some color variation to include females with some reddish hair apically on tergites 3 and 4, thus tending toward the nominate color form. The males exhibit more variation, especially in the amount of yellow hair on tergites 3 and 4. Nests of the nominate color form in Alberta, Canada, are discussed by Hobbs (1967b).

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Apocynaceae  Apocynum @ EMEC (10)
Asteraceae  Achillea sp @ BBSL (2)

Agoseris glauca @ RMBL_ENT (1)

Arnica parryi @ RMBL_ENT (13)

Aster integrifolius @ BBSL (1)

Aster sp @ BBSL (3)

Aster @ AMNH_BEE (2)

Centaurea sp @ BBSL (1)

Centaurea @ LACM_ENTB (6)

Cirsium arvense @ DART_ENT (1)

Cirsium foliosum @ BBSL (1)

Cirsium hookerianum @ BBSL (1)

Cirsium sp @ BBSL (42); BBSL__JPS (2)

Cirsium @ EMEC (11); I_STA (1)

Ericameria @ CSCA (2)

Erigeron elatior @ RMBL_ENT (2)

Erigeron speciosus @ BBSL (3)

Grindelia squarrosa @ BBSL (1)

Helianthella quinquenervis @ RMBL_ENT (3)

Helianthus @ EMEC (3)

Heliomeris multiflora @ RMBL_ENT (90)

Heliomeris villosa @ RMBL_ENT (8)

Heterotheca villosa @ RMBL_ENT (9)

Hymenoxys hoopesii @ RMBL_ENT (1)

Microseris nutans @ BBSL (2)

Onopordum acanthium @ BBSL (1)

Rudbeckia sp @ BBSL (2)

Rudbeckia @ AMNH_BEE (1)

Senecio bigelovii @ RMBL_ENT (1); DART_ENT (1)

Senecio sp @ BBSL (1)

Senecio triangularis @ RMBL_ENT (7)

Solidago sp @ BBSL (1)

Wyethia amplexicaulis @ BBSL (1)

Wyethia sp @ BBSL__OS (1)
Boraginaceae  Mertensia @ EMEC (3)

Phacelia heterophylla @ UCRC_ENT (1)

Phacelia @ EMEC (2)
Caprifoliaceae  Lonicera involucrata @ BBSL (4)

Lonicera sp @ BBSL (1)

Symphoricarpos albus @ BBSL (35)

Symphoricarpos sp @ BBSL (11)
Clusiaceae  Hypericum perforatum @ BBSL (2)
Crassulaceae  Sedum @ RMBL_ENT (3)
Ericaceae  Gaultheria shallon @ BBSL (19)

Rhododendron macrophyllum @ BBSL (2)

Rhododendron @ AMNH_BEE (2)
Fabaceae  Astragalus miser @ BBSL (3)

Astragalus sp @ BBSL (2); BBSL__JPS (1)

Hedysarum boreale @ BBSL (19)

Lathyrus odoratus @ BBSL (19)

Lathyrus sp @ BBSL (34)

Lupinus sp @ BBSL (12)

Lupinus @ LACM_ENTB (3)

Medicago sativa @ BBSL (1)

Melilotus alba @ BBSL (8)

Melilotus albus @ EMEC (5)

Melilotus sp @ BBSL (4)

Thermopsis montana @ BBSL (1)

Trifolium longipes @ BBSL (1)

Trifolium nanum @ BBSL (1)

Trifolium pratense @ BBSL (15)

Trifolium repens @ BBSL (29)

Trifolium sp @ BBSL (17)

Vicia gigantea @ BBSL (66)

Vicia sp @ BBSL (75)

Vicia @ EMEC (1)
Freilich, j.  1630 @ JRYA__OLYM (1)

857 @ JRYA__OLYM (1)
Gentianaceae  Gentiana parryi @ RMBL_ENT (15)
Geraniaceae  Geranium fremontii @ BBSL (1)

Geranium parryi @ RMBL_ENT (1)

Geranium robertianum @ BBSL (1)

Geranium sp @ BBSL (50)

Geranium viscosissimum @ BBSL (1)
Herndon, j.d.  1154 @ JRYA__OLYM (1)

1348 @ JRYA__OLYM (7)

1402 @ JRYA__OLYM (1)

1424 @ JRYA__OLYM (1)

1449 @ JRYA__OLYM (1)

1487 @ JRYA__OLYM (7)

1584 @ JRYA__OLYM (3)

1608 @ JRYA__OLYM (2)

1639 @ JRYA__OLYM (1)

1799 @ JRYA__OLYM (2)
Hydrophyllaceae  Phacelia leptosepala @ BBSL (8)

Phacelia sp @ BBSL (6)
Lamiaceae  Agastache sp @ BBSL (8)

Agastache urticifolia @ I_JSA (3)

Mentha @ EMEC (1)

Monarda sp @ BBSL (15)

Monardella sp @ AMNH_BEE (14); BBSL (3)

Monardella @ AMNH_BEE (4)

Prunella sp @ BBSL (1)

Prunella vulgaris @ BBSL (1)
Larson, l.  1731 @ JRYA__NOCA (3)
Liliaceae  Allium campanulatum @ BBSL (1)

Allium sp @ BBSL (3)
Malvaceae  Iliamna rivularis @ BBSL (1)
Mertensiidae  Mertensia sp @ BBSL (1)
Onagraceae  Chamerion angustifolium @ RMBL_ENT (22)

Clarkia unguiculata @ EMEC (1)

Epilobium angustifolium @ EMEC (2); BBSL (90); LACM_ENTB (1); RMBL_ENT (2)

Epilobium latifolium @ BBSL (3)

Epilobium parviflorum @ BBSL (62)

Epilobium sp @ BBSL (5)

Epilobium @ EMEC (3)
Phrymaceae  Mimulus @ EMEC (1)
Plantaginaceae  Keckiella rothrockii @ LACM_ENTB (1)

Linaria vulgaris @ UCRC_ENT (1); RMBL_ENT (2)

Penstemon heterodoxus @ EMEC (6)

Penstemon @ EMEC (1)
Polemoniaceae  Polemonium sp @ BBSL (1)
Polycitoridae  Salix sp @ BBSL__JPS (1)
Polygonaceae  Eriogonum @ CSCA (1); EMEC (1)
Ranunculaceae  Aconitum columbianum @ RMBL_ENT (3)

Delphinium barbeyi @ RMBL_ENT (3)

Delphinium nuttallianum @ BBSL (3); RMBL_ENT (4)

Delphinium sp @ BBSL (18)
Rosaceae  Pentaphylloides floribunda @ DART_ENT (1)

Potentilla fruticosa @ RMBL_ENT (1)

Potentilla sp @ BBSL (4)

Potentilla @ RMBL_ENT (1)

Rosa sp @ BBSL (12)

Rosa woodsii @ I_ADG (1)

Rosa @ AMNH_BEE (1)

Rubus allegheniensis @ BBSL (5)

Rubus discolor @ BBSL (8)

Rubus parviflorus @ BBSL (2)

Rubus sp @ BBSL (18)

Spiraea douglasii @ BBSL (11)
Rykken, j.  1274 @ JRYA__OLYM (2)

1281 @ JRYA__NOCA (1)

1299 @ JRYA__NOCA (1)

1320 @ JRYA__OLYM (1)

1322 @ JRYA__NOCA (6)

1348 @ JRYA__OLYM (3)

1361 @ JRYA__OLYM (4)

1373 @ JRYA__OLYM (1)

1379 @ JRYA__OLYM (2)

1398 @ JRYA__OLYM (2)

1409 @ JRYA__OLYM (2)

1450 @ JRYA__OLYM (1)

1452 @ JRYA__OLYM (2)

145 @ JRYA__NOCA (2)

1463 @ JRYA__OLYM (3)

1487 @ JRYA__OLYM (8)

1497 @ JRYA__OLYM (1)

1501 @ JRYA__OLYM (2)

1509 @ JRYA__OLYM (11)

1511 @ JRYA__NOCA (3)

1527 @ JRYA__OLYM (4)

1535 @ JRYA__OLYM (3)

1537 @ JRYA__OLYM (3)

153 @ JRYA__NOCA (3)

154 @ JRYA__NOCA (1)

1559 @ JRYA__OLYM (7)

1565 @ JRYA__OLYM (1)

1668 @ JRYA__NOCA (3)

1669 @ JRYA__OLYM (2)

1670 @ JRYA__OLYM (1)

1735 @ JRYA__NOCA (1)

1745 @ JRYA__NOCA (1)

1821 @ JRYA__NOCA (6)

1871 @ JRYA__NOCA (2)

1934 @ JRYA__OLYM (1)

1 @ JRYA__OLYM (1)

228 @ JRYA__OLYM (1)

504 @ JRYA__NOCA (2)

507 @ JRYA__NOCA (1)

5 @ JRYA__OLYM (2)

938 @ JRYA__NOCA (1)
Salicaceae  Salix @ AMNH_BEE (1)
Saxifragaceae  Heuchera grossulariifolia @ BBSL (1)

Ribes cereum @ EMEC (1)

Ribes @ EMEC (2); UCRC_ENT (1)
Scrophulariaceae  Castilleja miniata @ BBSL (2)

Castilleja sp @ BBSL (1)

Digitalis purpurea @ BBSL (1)

Linaria vulgaris @ BBSL (39)

Pedicularis groenlandica @ BBSL (4)

Pedicularis labradorica @ BBSL (2)

Penstemon attenuatus @ BBSL (8)

Penstemon confertus @ BBSL (1)

Penstemon cyananthus @ BBSL (1)

Penstemon sp @ BBSL (28)

Penstemon sp_( @ BBSL (1)

Penstemon washingtonensis @ BBSL (3)

Scrophularia californica @ BBSL (2)

Scrophularia sp @ BBSL (8)

Verbascum sp @ BBSL__JPS (1)

Verbascum thapsus @ BBSL (1)
Violaceae  Viola sp @ BBSL (1)
_  Withheld @ BBSL__YOSE (28); BBSL (81); BBSL__ZION (2); BBSL__CAVE (4)

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Bombus flavifrons
Bombus flavifrons
Yellow-fronted Bumble Bee
(shown with Agastache urticifolia )
ID: 0000 0000 1014 0575 [detail]
© 2014 Christopher L. Christie

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