xylophagan

from The Century Dictionary.

• In entomology, of or pertaining to the Xylophaga, in either sense.
• noun A member of the Xylophaga, in either sense.

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

• noun One of a tribe of beetles whose larvæ bore or live in wood.
• noun Any species of Xylophaga.
• noun Any one of the Xylophagides.

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

• noun Any insect of the genus Xylophaga, which bores into wood.