Cibyra brunnea is a species of moth of the family Hepialidae. It is known from Venezuela and Peru. The wingspan is about 31 mm. The forewings are light brown, the costa spotted with black. There is a basal and inner oblique row of dark brown spots, as well as a median row of large brown spots. There are also three silvery spots and a broad outer brown shade, edged on either side with dark brown and then fawn. The hindwings are dull blackish brown.