Dispose of the males. They don't have ovaries. Local laws may make it awkward for you to release animals from laboratory environments, so dump them into a bottle of ethanol. They'll probably die happy, to the extent that fruitflies can really be happy.

and…

Slowly move the tweezers apart. If you are lucky, the abdomen will split and you'll start pulling out internal organs. If you're unlucky, the head will come off.

Eew! :D

Tags: fun, gnome