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 :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::