Amphitorna castanea is a moth in the Drepanidae family. It was described by Hampson in 1891. It is found in India (Nilgiris). The wingspan is 28-36 mm. Adults are pale reddish brown, the wings evenly striated with brown. There is an oblique line from the apex of the forewings to the middle of the inner margin of the hindwings, bent near the apex, where there is a deep black spot above it. There are traces of a dark antemedial line on the forewings and the costa is red-brown. There is a white speck on the discocellulars.