Adult female about 40mm wingspan, forewing colour is dirty white with distinctive wavy brown and black markings; the hindwing is mainly white with some black scales along the margins. Male about 25mm wing span, fore wings brown with wavy, mottled pattern while hindwings almost uniform brown. (See images)
Larvae grow to about 30mm long and the body has distinct tufted hairs. At first the larvae skeletonize the leaves, but soon they devour all but the main vein and petiole.
Note that some females have vestigial wings.