Booklouse

Scientific Name: Various species in the order Psocoptera

Order & Family: Psocoptera, commonly Liposcelididae or Psocidae

Size: 1-2 mm

Booklouse

Natural Habitat

Damp, warm, and dark environments, often found in books, papers, stored food products, wall voids, and bathrooms.

Diet & Feeding

Fungi, mold, starch, paste, glues in books and wallpaper, dead insects, and cereal products.

Behavior Patterns

Often found in groups, they are harmless but can be a nuisance. They thrive in high humidity and are usually indicators of moisture problems. They have a short life cycle (about 2-3 months) and can reproduce rapidly.

Risks & Benefits

Generally harmless to humans; they do not bite or transmit diseases. However, large infestations can contaminate stored food and damage books or papers. Their presence often indicates underlying moisture issues that could lead to mold growth.

Identified on: 11/9/2025