A guy working on bumble bees in my lab used a very simple method: he
just shredded up laurel leaves (they are poisonous - releases cyanide in
small quantities, I think), put them under a cottonwool plug in a
specimen tube and popped the bee in on top, then stoppered the tube. You
leave them in there for some time - they don't go stiff or brittle and
keep their colour - then they can be pinned out.
                           Pam Munn
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