Synemon nupta is a moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 in the Castniidae

Castniidae

Castniidae, or castniid moths, is a small family of moths with less than 200 species: The majority are Neotropical with some in Australia and a few in south-east Asia. These are medium-sized to very large moths, usually with drab, cryptically-marked forewings and brightly coloured hindwings. They...

 family. It is found in Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, including Western Australia

Western Australia

Western Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east...

.

The head and body are brown, the abdomen with some reddish suffusions. The forewings are brown and densely suffused with greyish white in some parts, leaving places not suffused and thus forming a medial band deeply elbowed outwardly in its centre. The hindwings are bright deep black, bright crimson in the centre, enclosing a short discal black band which runs into the black outer margin before the middle, leaving a crimson sub-apical discal spot. The underside of both wings is black, on the forewings suffused with crimson on the basal half of the costal space.