Wood and insects. WTF is this?

[*Wyche'sWarrior*]

Carpenter bees, no question. My house has cedar siding on the upper level, and I have three decks. I battle these ***** every year. Spray inside the bore hole until whatever insecticide you use runs out, let it dry, then caulk the hole. Paint it. That should solve the issue of larvae hatching next year.