The adult moth of this species has speckled fawn forewings which shade darker toward the wing-tips. The hindwings are similar but paler. The moth has a variable wingspan up to 1.5 cms. The species has been found in Australia in Queensland, New South Wales, Australian Capital Territory, Tasmania, South Australia, and Western Australia.
Unplaced monopthalma is listed in the following regions:
Canberra & Southern Tablelands