Naarda leptosigna is a moth of the family Erebidae first described by Balázs Tóth and László Aladár Ronkay in 2015.

Labial palpi convex, dorsal edge rounded.

Bright ocherous reniform stigma is narrow and triangular.

Male has huge lobe on the valva, which is the largest of the genus.

Uncus medium long, broad and slightly curved.