The fact is the honeybee have higher temperature as inner and to bear it. So they swarm scout hornet to immobilize (sheer mass of swarm too mush for hornet's strength) in way depicted on panel 3, and by their higher than hornet's temperature heat it up. Literally "frying alive".
This is useful!I won't lose to you today, Yuuka!Flower & BeeWhat? Honeybee can even beat a Asian Giant Hornet with such a way?