Cnaphalocrocis hexagona is a moth in the family Crambidae. It was described by Oswald Bertram Lower in 1903. It is found in Australia, where it has been recorded from Queensland^[1] and the Northern Territory.^[2]

The wingspan is about 12 mm. The forewings are pale brassy-yellow, with fuscous markings. There is a fine slightly outwardly curved line from one-fourth of the costa to one-fourth of the inner margin and a second from beneath the costa in the middle, curved outwards and slightly sinuate beneath, ending on the inner margin about the middle. The third runs from the costa at three-fourths to the inner margin at three-fourths. There is a faint fuscous subterminal shade and a fine line along the termen. The hindwings are similar to the forewings.^[3]

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