From Pathfinder #158: Sixty Feet Under, which isn't enabled.

Bone Skipper Swarm

CREATURE 6

UNCOMMON LARGE ANIMAL SWARM

Perception +17; darkvision; bonesense (imprecise) 30 feet

Skills Acrobatics +17

Str -4, Dex +5, Con +4, Int -5, Wis +2, Cha -5

Bonesense (Imprecise) 30 feet

A bone skipper swarm identifies bones and creatures with a skeletal system in the listed range.

AC 24; Fort +14, Ref +17, Will +12

HP 120; Immunities precision, swarm mind; Weaknesses area damage 9, splash damage 9; Resistances bludgeoning 5, piercing 9, slashing 9

Swarm Mind

This monster doesn't have a single mind (typically because it's a swarm of smaller creatures), and is immune to mental effects that target only a specific number of creatures. It is still subject to mental effects that affect all creatures in an area.

Speed 25 feet, fly 40 feet

Marrow Rot (disease)

Marrow rot affects only creatures with a skeletal system

Saving Throw DC 24 Fortitude

Onset 1 day

Stage 1 Enfeebled 1 (1 day)

Stage 2 Enfeebled 2 (1 day)

Stage 3 Enfeebled 2 and Drained 1 (1 day)

Swarming Bites

Each enemy in the swarm's space takes 3d6 piercing damage (DC 24 basic Reflex) save plus exposure to marrow rot.

Pathfinder #158: Sixty Feet UnderOGL