With more than 5,000 species of booklice worldwide, the most common in Singapore are:
- Wingless Booklouse (Liposcelis spp.)
- Grain Psocid (Lachesilla pendicularia)
- Deathwatch Psocid (Trogium pulsatorium)
They have often been mistaken for Termites or “white ants”, but on closer examination booklice have more prominent eyes and a distinct neck. They are treated as a nuisance pest and do not transmit diseases.