A quick google search turned up a good reference at:
http://members.aol.com/beetools/bumble.htm
There is also a bumble bee list (BOMBUS-L) that used to be hosted at
UAlbany, but migrated to I don't know where (Guelph?). Peter Kevin, Liz
Day, are you out there?
Bumbles are way cool, but Apis rules!
Cheers,
Aaron
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