Sometimes called Psocids, these insects are common resident pests in libraries, homes and warehouses; often occuring in stored foods. Psocids feed principally on microscopic moulds on damp materials (glues, books, paper, wallpaper, wood and plaster) and also live on foods with a high vitamin B content. They are common pests of new houses where wood and plaster is still damp. Despite their name, booklice do not bite.
When valuable books or other items are infested, fumigation will control booklice without damaging the articles.