n medium animal 

Perception +7; darkvision, tremorsense (imprecise) 30 feet

Skills Athletics +7, Stealth +7

Str +2 Dex +4 Con +3 Int -5 Wis +2 Cha -4

AC  16; Fort +6, Ref +9, Will +5

HP 20

Speed 30 feet, climb 15 feet

Melee [>] pincer +9 (agile, finesse), Damage 1d8+2 slashing plus Grab

Melee [>] stinger +9 (finesse), Damage 1d6+2 piercing plus cave scorpion venom

Cave Scorpion Venom (poison) Saving Throw DC 17 Fortitude; Maximum Duration 6 rounds; Stage 1 1d4 poison damage (1 round); Stage 2 1d6 poison damage and enfeebled 1 (1 round); Stage 3 1d8 poison damage and enfeebled 2 (1 round)

Bestiary 2, page 234.