Giant Beetle, Bombardier (CR 2)

Medium Vermin
Alignment: Always Neutral
Initiative: +0; Senses: darkvision 60 ft.

AC: 16 (+6 natural), touch 10, flat-footed 16
Hit Dice: 2d8+4 (13 hp)
Fort +5, Ref +0, Will +0
Speed: 30 ft.
Space: 5 ft./5 ft.
Base Attack +1; Grapple +2
Attack: Bite +2 melee
Full Attack: Bite +2 melee
Damage: Bite 1d4+1
Special Attacks/Actions: Acid spray
Abilities: Str 13, Dex 10, Con 14, Int -, Wis 10, Cha 9
Special Qualities: vermin
Feats: -
Skills: -
Advancement: 3-4 HD (Medium-size); 5-6 HD (Large)
Climate/Terrain: Warm forest
Organization: Cluster (2-5) or swarm (6-11)
Treasure/Possessions: None

Source: Monster Manual

Acid Spray (Ex): When attacked or disturbed, a giant bombardier beetle can release a 10-foot cone of acidic vapor once per round. Those within the cone must succeed at a Fortitude save (DC 13) or take 1d4+2 points of damage.

Giant bombardier beetles bite with their mandibles and spray acid.

These creatures feed primarily on carrion and offal, gathering heaps of the stuff in which to build nests and lay eggs. A giant bombardier beetle is about 6 feet long.

Giant bombardier beetles have no interest in other creatures. They normally attack only to defend themselves, their nests, or their eggs.