From Pathfinder Adventure: The Fall of Plaguestone, which isn't enabled.

Bee Swarm

CREATURE 1

Perception +5; darkvision

Skills Acrobatics +9, Stealth +7

Str -1, Dex +4, Con +1, Int -5, Wis +1, Cha -4

AC 17; Fort +4, Ref +9, Will +4

HP 18; Immunities precision, swarm mind; Weaknesses area damage 5, splash damage 5; Resistances bludgeoning 2, piercing 5, slashing 5

Speed fly 20 feet

Beestings (poison)

The creature must attempt a DC 16 Fortitude save. Those who fail take 1d4 poison damage and are Clumsy 1 for 1 minute.

Swarming Stings

Each enemy in the swarm's space takes 1d4 piercing damage (DC 16 basic Reflex save). The first time each round a creature fails the save and takes piercing damage, it also suffers the effect of beestings.

Whenever the bee swarm uses this ability, the swarm takes 1 damage.

Pathfinder Adventure: The Fall of PlaguestoneOGL