Wood-destroying beetles: The damage looks like small, shallow holes drilled by a power tool.Fabric-destroying beetles: Generally speaking, they eat fabric when they are in the larval stage. The damage they cause looks like worms have chewed through the fabric. Carpet-destroying beetles: These beetles create similar damage to carpet material.Food-eating beetles: These munchers eat stored grain and other foods, either during the larval stage or during the adult stage. By sifting through flour or stored grains, evidence of these beetles is easy to find. You’ll either discover worm-like larvae or fully-grown adult beetles.