On Apr 30, 2012, DWMike from Grenada, MS (Zone 8a) wrote:
3 - 4mm in length
Food hosts: A wide variety of hardwoods, favors hickories (Carya) and persimmon (Diospyros virginiana); larvae feed mostly in sapwood and to some extent in heartwood, adults often bore into healthy twigs for food and shelter(1)
(1) Guide to insect borers in North American broadleaf trees and shrubs
By Solomon, J.D. 1995.