I think this could be D. concolor; confirmation would be appreciated. Under a small log in deciduous forest at ~1500 feet. According to Lobl & Calame (1996), D. bicolor can be eliminated by 1) habitat (it's only found in spruce-fir forests at high elevations) and 2) its elytra each have a spot; this specimen's elytra are unicolored. The other option, D. carolinensis, has pronotal tubercules that are longer than they are wide, although this isn't easy for me to evaluate in my photo or in Jeff's photos. To my eyes, this specimen's pronotal margins are relatively smooth, without elongate tubercules. Very psocid-like at first glance without magnification.