Surattha diffusilinea is a moth in the family Crambidae. It was described by George Hampson in 1919. It is found in Australia, where it has been recorded from New South Wales.[1]
The forewings are white, faintly tinged with rufous and slightly irrorated (sprinkled) with blackish. There is a black antemedial line and two similar medial lines. The hindwings are white, faintly tinged with rufous.[2]