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Source: Bumble Bees of the Western United States, website (version 01/01/2011)

ITIS records citing this source
 
 Kingdom Animalia
  Bombus appositus Cresson, 1879 -- valid -- White-shouldered Bumble Bee
  Bombus balteatus Dahlbom, 1832 -- valid -- High Country Bumble Bee
  Bombus bifarius Cresson, 1879 -- valid -- Black-notched Bumble Bee, Two form Bumble Bee
  Bombus californicus Smith, 1854 -- valid -- California bumble bee
  Bombus caliginosus (Frison, 1927) -- valid -- Obscure bumble bee
  Bombus centralis Cresson, 1864 -- valid -- Central bumble bee
  Bombus crotchii Cresson, 1879 -- valid -- Crotch bumble bee
  Bombus fervidus (Fabricius, 1798) -- valid -- Yellow bumble bee
  Bombus flavifrons Cresson, 1864 -- valid -- Yellow head bumble bee
  Bombus franklini (Frison, 1921) -- valid -- Franklin bumble bee
  Bombus huntii Greene, 1860 -- valid -- Hunt bumble bee
  Bombus insularis (Smith, 1861) -- valid -- Indiscriminate cuckoo bumble bee
  Bombus melanopygus Nylander, 1848 -- valid -- Black tail bumble bee
  Bombus mixtus Cresson, 1879 -- valid -- Fuzzy-horned bumble bee
  Bombus morrisoni Cresson, 1879 -- valid -- Morrison Bumblebee
  Bombus nevadensis Cresson, 1874 -- valid -- Nevada Bumble Bee
  Bombus occidentalis Greene, 1858 -- valid -- Western Bumble Bee
  Bombus rufocinctus Cresson, 1864 -- valid -- Red-belted bumble bee
  Bombus sitkensis Nylander, 1848 -- valid -- Sitka bumble bee
  Bombus sonorus Say, 1837 -- valid -- Sonoran Bumble Bee
  Bombus suckleyi Greene, 1860 -- valid -- Suckley cuckoo bumble bee
  Bombus sylvicola Kirby, 1837 -- valid -- Forest bumble bee
  Bombus terricola Kirby, 1837 -- valid -- Yellow-banded Bumble Bee
  Bombus vandykei (Frison, 1927) -- valid -- van Dyke bumble bee
  Bombus vosnesenskii Radoszkowski, 1862 -- valid -- Vosnesensky bumble bee
   

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