Metallarcha zygosema

Metallarcha zygosema is a moth in the Crambidae family. It was described by Lower in 1897. It is found in Australia,^[1] where it has been recorded from Western Australia^[2] and South Australia.

The wingspan is about 20 mm. The forewings are light brown, with pale yellow markings outlined with darker brown. There is a large irregular cuneiform patch from the base below the costa, its lower edge emitting a long slender streak along the inner margin to the anal angle. there is also a large irregular lunate mark in the middle of the wing, connected with the basal patch anteriorly by a short bar. The hindmarginal line is narrow and yellowish. The hindwings are pale fuscous, with a pale yellow basal patch.^[3]

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