Powder Post Beetle Powderpost beetles are a group of seventy species of woodboring beetles classified in the insect subfamily Lyctinae. These beetles, along with spider beetles, death watch beetles, common furniture beetles, skin beetles, and others, make up the superfamily Bostrichoidea. While most woodborers have a large prothorax, powderpost beetles do not, making their heads more visible. In addition to this, their antennae have two-jointed clubs. They are considered pests and attack deciduous trees, over time reducing the wood to a powdery dust. The damage caused by longhorn beetles (family Cerambycidae) is often confused with that of powderpost beetles, but the two groups are unrelated. Habits and Habitat Their larvae are white and C-shaped. The term "powderpost" comes from the fact that the larvae of these beetles feed on wood and, given enough time, can reduce it to a mass of fine powder. Because of this behavior, they are considered pests. Powderpost beetle larvae spend months or years inside wood while developing, feeding mainly on the starch content. Their presence is only apparent when they emerge as adults, leaving behind pinhole-sized openings, often called "shot holes". They may also leave piles of powdery frass below. Shot holes normally range in diameter from 1⁄32 inch (0.79 mm) to 1⁄8 inch (3.2 mm), depending on the species of beetle. If wood conditions are right, female beetles may lay their eggs and re-infest the wood, continuing the cycle for generations. Powderpost beetles feed on deciduous trees, including certain hardwoods or softwoods depending on the species. Some hardwoods are naturally immune if they have low starch content or if their pore diameters are too small for the female beetle's ovipositor to lay her eggs in. Wood preservatives can be used to prevent beetle infestation. Common treatments may use boron. Items that can be infested by powderpost beetles include wooden tools or tool handles, frames, furniture, gun stocks, books, toys, bamboo, flooring, and structural timbers. Descriptive Types Anobiidae is a family of beetles. The larvae of a number of species tend to bore into wood, earning them the name "woodworm" or "wood borer". A few species are pests, causing damage to wooden furniture and house structures, notably the deathwatch beetle, Xestobium rufovillosum, and the common furniture beetle, Anobium punctatum. The Bostrichidae are a family of beetles with more than 700 described species. They are commonly called auger beetles, false powderpost beetles or horned powderpost beetles. The head of most auger beetles cannot be seen from above, as it is downwardly directed and hidden by the thorax. An exception is the powderpost beetles from the subfamily Lyctinae. Bostrychoplites cornutus has large distinctive thoracic horns, and is found in parts of Africa and Arabia; it is often imported to Europe as larvae in African wooden bowls("ethnic souvenirs") . The adult lyctid powderpost beetle is a small (3/32 to 1/4 inch-long), cylindrical, brown beetle that attacks hardwood. Damage caused by the powderpost beetle is usually first detected with the appearance of holes in wood, 1/32 – 1/16 inch-diameter, from which a very fine sawdust may fall. Larvae of the powderpost beetle feed on many of the various hardwoods used in furniture, baskets, hardwood trim and flooring. Infestations in homes are almost always due to infestation of the wood prior to construction.