Identification Covell, Moths of Eastern North America, Page 333. The species is sexually dimorphic (a condition in which the form or pattern of the male differs from that of the female). The forewing is generally gray in males and more brownish in females. In both sexes look for a black edge on the inner margin at the base of the forewing, a double blackish ante-median line and a black curved line formed by a black terminal dash that meets the inner edge of the reniform spot. The apical patch is whitish in males, pinkish-brown in females. The hindwing is whitish in males and grayish-brown in females. The caterpillar host plants are oaks.