I think the best way as I do, firstly, nearly fill small petri dish with praffin wax, put the winged insect ( as mosquitoes) specimens on the wax, then, under the insect binocular microscope - precisely - cut the wings by fine dissecting knife.

Two Ways

1 use pointed scissors or fine blade cutter

2 use glass slide for dissection instead of wax put mosquito on slide ventral side upward (before this anesthise mosquito under chilled condition so that it is not moving press cutter on the place you want to cut it will be easy