Laurence Edwards explains that bees hide swarm cells in unexpected places, so a virgin queen might be anywhere in the colony. Find and remove her before introducing a new queen, unless you want to let her mate outdoors. Sunny weather makes successful mating much more likely.
Bees hide swarm cells in the most unlikely of places. This one here has emerged, and a virgin will be in this colony somewhere. If you're seeing this, you need to find the virgin and kill her before you introduce a queen, or you can just let her try and mate in the sunshine. And if the weather's like it is today, they stand a pretty good chance.
