Brown pupal skins protruding from entrance holes are common in early summer. Adults are grayish, stout-bodied moths. The hindwing in the male has an orange spot. Identifying the Injury. Later, frass is ejected from entrance holes.
Galleries are open or loosely plugged with frass.
Holes in lumber are dark stained. Eggs hatch in 10 to 12 days, and young larvae tunnel into the bark and wood. Pupation occurs within the gallery during spring and lasts 3 weeks. A life cycle requires 1 to 2 years in the South, and 2 to 4 years in the North. Larvae in oak.