Booklouse (or Psocid)
Scientific Name: Liposcelis spp. (Common genus for household booklice)
Order & Family: Order Psocodea (formerly Psocoptera), Family Liposcelididae
Size: Very small, typically 1 mm to 2 mm in length.
Natural Habitat
Found indoors in high-humidity areas such as bathrooms, kitchens, and basements. They thrive in damp books, cardboard boxes, wallpaper paste, and stored grains.
Diet & Feeding
They feed on microscopic molds, fungi, starch, paper glue, wallpaper paste, and occasionally stored dry food products like flour or grains.
Behavior Patterns
They are wingless, soft-bodied insects that move in quick, jerky motions. They do not bite or sting but reproduce rapidly in humid environments.
Risks & Benefits
They are generally harmless nuisance pests that do not bite humans or pets and do not transmit disease. However, their presence indicates high humidity and potential mold growth, and large numbers can contaminate stored food products.
Identified on: 2/21/2026