''Polysoma eumetalla'' is a

moth Moths are a group of insects that includes all members of the order Lepidoptera that are not Butterfly, butterflies. They were previously classified as suborder Heterocera, but the group is Paraphyly, paraphyletic with respect to butterflies (s ...

of the family

Gracillariidae Gracillariidae is an important family of insects in the order Lepidoptera and the principal family of leaf miners that includes several economic, horticultural or recently invasive pest species such as the horse-chestnut leaf miner, ''Cameraria ...

. It is known from the Australian states of

Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...

New South Wales New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...

South Australia South Australia (commonly abbreviated as SA) is a States and territories of Australia, state in the southern central part of Australia. With a total land area of , it is the fourth-largest of Australia's states and territories by area, which in ...

Tasmania Tasmania (; palawa kani: ''Lutruwita'') is an island States and territories of Australia, state of Australia. It is located to the south of the Mainland Australia, Australian mainland, and is separated from it by the Bass Strait. The sta ...

and

Victoria Victoria most commonly refers to: * Queen Victoria (1819–1901), Queen of the United Kingdom and Empress of India * Victoria (state), a state of Australia * Victoria, British Columbia, Canada, a provincial capital * Victoria, Seychelles, the capi ...

and from

New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...

. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the opposite wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingsp ...

is about 10 mm. Adults have a metallic gold colour with white markings. The

larva A larva (; : larvae ) is a distinct juvenile form many animals undergo before metamorphosis into their next life stage. Animals with indirect development such as insects, some arachnids, amphibians, or cnidarians typically have a larval phase ...

e feed in galls on ''

Acacia dealbata ''Acacia dealbata'', the silver wattle, blue wattle or mimosa, is a species of flowering plant in the legume family, Fabaceae. It is native to southeastern Australia and widely introduced in other warm climates. Description It is a fast-growing ...

'', caused by the rust fungus ''

Uromycladium tepperianum ''Uromycladium tepperianum'' is a rust fungus that infects over 100 species of ''Acacia'' and related genera including '' Paraserianthes'' in Australia, south-east Asia, the south Pacific and New Zealand.Morris, M.J. (1987). Biology of the ''Ac ...

'' and in galls on ''

Acacia melanoxylon ''Acacia melanoxylon'', commonly known as the Australian blackwood, is an ''Acacia'' species native to south-eastern Australia. The species is also known as blackwood, hickory, mudgerabah, Tasmanian blackwood, or blackwood acacia. The tree belon ...

'', caused by the fly '' Cecidomyia acaciaelongifoliae''.

References

Gracillariinae Moths of New Zealand Moths described in 1880 {{Gracillariinae-stub