I did a hive split yesterday hoping to create one more colony before winter. I used a queen purchased from B Weaver Apiaries of the same breed of my other splits. When I released the queen after a couple of days of introduction to the hive, the bees went crazy on her in a way I had not seen in the last splits. It turns out I had accidentally transferred the original queen in the split, and so the bees were attacking this rogue queen.
I was able to grab her and quickly introduced her, without a cage, to the queen-less split. But I think they smothered her as she had not been properly introduced. Beans.