Lyctid beetles Anobiids attack almost any kind of wood, but seem to prefer old wood. Bostrichids prefer to infest the sapwood of most hardwoods. The sawdust in the tunnels is caked together, rather than loose and powdery. Lictids infest the sapwood of hardwoods. They prefer newly seasoned wood, such as lumber in yards, new hardwood floors, and tool handles.
Adults are tiny but typical of beetles.
Larvae are grub-like with 3 pairs of tiny legs. Powderpost beetles make small round holes at sawed or round-edge surfaces when they emerge as adults. Holes may be numerous, especially on sapwood portions. Holes are connected to tunnels filled with coarse to powdery sawdust. Sawdust may fall from holes if wood is jarred, or may be pushed out by adults when they emerge.