(False Powderpost and Horned Powderpost Beetles)
- Adult size varies (1/8 to 1 inch) and color varies from dark brown to black. Adult is more robust than that of the true powderpost beetle; its body is cylindrical with a roughened thorax surface.
- Head is usually not visible from above, but there are many "atypical" individuals.
- Antennal clubs has three to four segments.
- Attacks softwoods as well as hardwoods, but rarely re-infests.
- Larvae are unable to digest cellulose; starch in the wood is digested.
- Frass is tightly packed and tends to stick together; it is meal0like with no pellets.
True powderpost betles (Previously Lyctidae) are now organized as a subfamily Lyctinae in the family Brostichidae, as another "atypical" Bostrichid (head visible from above).