<i>Bombus vandykei</i>
James P. Strange, USDA-ARS Pollinating Insect Research Unit
<a rel="nofollow" class="external text" href="ftp://ftp2.fs.fed.us/incoming/r6/ro/issssp/Inventories/BumbleBee.GuideWestern.FINAL.Feb2012.singlePages.pdf">Bumble Bees of the Western United States</a>