Favored Enemy Vermin doesn't work in the Infested Chambers

[Mushroom Mushroom]

The Infested Chambers are below the Drips, and should probably apply for FE vermin given the beetle menace present.

Vermin

    +4 vs poison.
    +1 Reflex.
    Spell Immunity: Web.
    +2 Listen, +2 Spot, +1 AB, +1 AC, while within the Sewers.