Monstrous Scorpion, Small (CR 1/2)

Small Vermin
Alignment: Always Neutral
Initiative: +0; Senses: darkvision 60 ft., tremorsense 60 ft., and Spot +4


AC: 14 (+1 size, +3 natural), touch 11, flat-footed 14
Hit Dice: 1d8+2 (6 hp)
Fort +4, Ref +0, Will +0
Speed: 30 ft.
Space: 5 ft./5 ft.
Base Attack +0; Grapple -4
Attack: Claw +1 melee
Full Attack: 2 claws +1 melee and sting -4 melee
Damage: Claw 1d3-1, sting 1d3-1 and poison
Special Attacks/Actions: Improved grab, constrict 1d3-1, poison
Abilities: Str 9, Dex 10, Con 14, Int -, Wis 10, Cha 2
Special Qualities: Vermin
Feats: Weapon Finesse (claw, sting)
Skills: Climb +3, Hide +8, and Spot +4
Advancement: -
Climate/Terrain: Warm desert
Organization: Colony (2-5) or swarm (6-11)
Treasure: None

Source: Monster Manual

Monstrous scorpions are vicious predators that make unnerving scuttling noises as they speed across dungeon floors. A monstrous scorpion has a low, flat body: 4 feet long, 2 feet wide* and 3 inches high**.
*The number includes the scorpion's body and its legs; the actual body width is about a third of the total.
**The number indicates the height of the creature's body; the creature's stinger usually is held about as high off the ground as the creature is wide.