To Blair J. Sampson:
 
Dear Blair,
 
I think cooling a bee is a fairly human way of anaesthetising her.
Giving her CO2 would probably also giver narcosis, but the setback is that
at her present temperature her metabolism would go on without her getting
any oxygen. This might kill her or at least damage part of her nervous tissue.
Or do you mean that by blasting her with CO2 you would just freeze her that
much faster? Then this has nothing to do with narcosis! By the way, would a
dead bee be that much worse for a photo session or does this go against your
conscience?
 
Wish you lots of succes with any method,
 
Richard van Ouwerkerk (anaesthesiologist)