Awake (and non-paralyzed, etc) queen bees periodically lay a killer bee egg if there is not already one on their square, and their square is walkable terrain.
Using #monster while polymorphed into a queen bee makes you secrete a lump of royal jelly. For balance, this should cost a lot more nutrition than the royal jelly contains, or have some other limiting method so you can’t use an indefinite food source to produce indefinite royal jelly.
Cut down on the list of inediate monsters by defining some of them to be either herbivorous or carnivorous (note that the game uses carnivorous to mean “can eat meat” rather than “only eats meat”).
Herbivores:
Carnivores:
Attacking a queen bee immediately awakens and aggravates all killer bees on the level.
Queen bees, being heavier and not flying often, should have a lower speed, at least as low as killer bees. They should perhaps get more attacks to compensate.
Queen bees drop a few killer bee eggs.
