The "Eggars". Medium to large sized moths with robust dense hairy bodies and broad rounded wings often with a small round discal spot and a simple pattern of cross lines on a plain background. Larvae plump cylindrical and densely hairy, in some species living in communal webs until the final instar. Pupa in a tough silken cocoon often mixed with larval hairs. Some sexually dimorphic with very active day flying males which assemble to females over large distances.