The nematoceran family Psychodidae (moth flies or drain flies) are small true flies (Diptera) with short, hairy bodies and wings giving them a “furry” moth-like appearance. Adult Psychodidae are typically nocturnal and associated with damp habitats. The larvae of the subfamilies Psychodinae, Sycoracinae and Horaiellinae live in aquatic to semi-terrestrial habitats (often with low oxygen), including bathroom sinks; some species are commonly nuisance pests in bathrooms.

The Drugstore beetle (Stegobium paniceum), also known as the

Bread beetle or Biscuit beetle, is a tiny, brown beetle that can be found infesting a wide variety of products, and is among the most common non-weevils to be found there. It is the only member of the monotypic genus Stegobium.