Lymantica leucophaes is a moth of the family Erebidae. It is found in eastern Madagascar.

The forewings of this species are white, with 6 prominent russet patches along the costa and traces of 3 fasciae of russet. Hindwings are russet with whitish towards the base.

The expanse of the males is 38 mm.Collenette, 1936, New Lymantriidae from Madagascar, Novitates Zoologicae XL., 1936, pages 168, Plate 12, fig.34

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