I have very dry wood but it all comes from wet areas so it is alder, willow, red cedar, and the occasional fir or cottonwood. I only have one bug that I can't seem to kill. It lives in cracks and in the bark of my firewood. I never see it burrowing, flying, biting, or crawling around except under the bark of my firewood. When I bring in an armload to burn, one or two of them will always fall off and scurry around. These bugs are not active. The colony has been in my stacks for years and I never see them on new wood. What the heck is it? They are only about 3/8" long. For your help, a homebrew red ale.