[1] The family includes fewer than 200 species, most of them in the genus Ectopsocus.

In the genera Ectopsocus and Ectopsocopsis, fourteen species are known from North America.

Ectopsocids have been found to inhabit dead leaves on tree branches and leaf litter.

These are brown, small-sized bark lice (1.5-2.5 mm, both nymphs and adults) with or without markings on wings.

The following are the distinctive features of these family members: Data related to Ectopsocidae at Wikispecies