''Palaeosia'' is a monotypic moth genus in the family

Erebidae The Erebidae are a family of moths in the superfamily Noctuoidea. The family is among the largest families of moths by species count and contains a wide variety of well-known macromoth groups. The family includes the underwings ('' Catocala'') ...

erected by George Hampson in 1900. Its only species, ''Palaeosia bicosta'', the two-ribbed arctiid or two-ribbed footman, was first described by Francis Walker in 1854. It is found in south-eastern

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

. The wingspan is about 30 mm. The larvae feed on lichen.

Former species

* ''Palaeosia longistriga'', now '' Oeonosia longistriga'' (Bethune-Baker, 1908)

References

* Lithosiina Moths described in 1854 Monotypic moth genera {{Lithosiina-stub