The adult moths of this species have forewings that are pale brown each with a darker band and two dark spots, and that have fringes along the hind margin that are longer than the width of the rest of the wing. The hindwings paler and narrower, and have fringes along the costa and even longer ones along the hind margin. The wingspan is about 1.5 cms.
Blastobasis tarda is listed in the following regions:
