xylophilous

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Growing or living on or in wood.

from The Century Dictionary.

• In phytogeography, growing on wood in any state: applied to a class of fungi.
• Fond of wood, as an insect; living or feeding upon wood.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Zoöl.) Of or pertaining to the xylophilans.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Living on or in wood, as some fungi and beetles do.