n large animal 

Perception +9; darkvision, tremorsense (imprecise) 60 feet

Skills Athletics +11, Stealth +7

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

AC  19; Fort +12, Ref +9, Will +7

HP 45

Attack of Opportunity [R] Stinger only.

Speed 40 feet

Melee [>] pincer +11 (agile, reach 10 feet), Damage 1d8+6 slashing plus Grab

Melee [>] stinger +11 (reach 10 feet), Damage 1d6+6 piercing plus giant scorpion venom

Constrict [>] 1d6+4 bludgeoning, DC 20

Giant Scorpion Venom (poison) Saving Throw DC 18 Fortitude; Maximum Duration 6 rounds; Stage 1 1d10 poison damage and enfeebled 1 (1 round); Stage 2 2d10 poison damage and enfeebled 1 (1 round); Stage 3 2d10 poison damage and enfeebled 2 (1 round)

Bestiary, page 285.