Metallarcha thiophara is a moth in the family Crambidae. It was described by Turner in 1917. It is found in Australia, where it has been recorded from Western Australia.CSIRO Ecosystem Sciences - Australian Moths Online
The wingspan is about 23 mm. The forewings are pale yellow with fuscous markings. There is a costal streak from the base and a short inwardly oblique fine streak from the dorsum, as well as a broad terminal band. The hindwings are pale ochreous with some pale fuscous irroration and a large pale fuscous apical patch.Proceedings of the Royal Society of Queensland
It is found in South Australia, Western Australia, and the Northern Territory.
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