From my 2nd ed now out of date yet oh so classic Monstrous Manual: (Hehe, couldn't resist)
Bombardier Beetle
AC: 4
Movement: 9
Hitdice: 2+2
THACO: 19
No.OF ATTACKS: 1 (!!)
Damage/Attack: 2-12
Special: Acid Cloud
Special defense: Fire Cloud
Magic Resistance: Nil (?)
Size (S) (4' long)
Morale: Elite (13)
XP Value: 120
Ecology:
Interestingly, if a bombardier beetle is killed before it has the opportunity to fire off blasts of acid/fire, it is meant to be possible to cut the creature open to retrieve the chemicals. These can be then combined to produce a small explosive or fire projectile with the proper equipment.
Now wouldn't that be cool? A nice bit of revenge I say for all of the times I've had to rescue stunned comrades from their pesky little attacks. Give them lots of arrows and rocks to eat before they get close I say!