The moth is characterized by long, narrow, usually dark forewings which are pale near the tips. There are three black dashes on each forewing.
Hind wings are white with dark veins and broad, dark, indefinite margins.
The wingspan varies from 38 to 51 mm. Egg - The egg is white, round, and about 0.5 mm in diameter. Larva - There are six instars ranging from 4 to 46 mm in length. Above the spiracles, the larva is basically one color, varying from light gray to nearly black. The spiracles are distinctly black.