Some beetles are known to cause damage to structures in some areas of the United States. They can damage both hardwoods and softwoods such as floor joists in crawlspaces, hardwood floors, picture frames, wooden tool handles, etc. The damage is done by the immature stage of the beetles and not the adults themselves, even though the adults are the ones that make the “exit” holes which is the first visible signs of an infestation. There are three groups of beetles that make up the category of Powderpost beetles, the Lyctids, the Bosctrichids and the Anobiids.