Packard's Girdle

Wingspan 32–36 mm. Adult moths have a light brownish-gray ground color with dark speckling, a dash-shaped discal spot, and prominent Antemedial and postmedial lines. The PM line is a zig-zagging mix of jagged and rounded points, angled diagonally from inner margin toward the apex and reaching the costa edge of the wing in the apical area. The hindwing is paler with a dark, sinuous PM line.

One generation of larvae are born per year. Females lay about 55 eggs on foliage. Larvae emerge about two weeks later and feed until onset of cold weather. It overwinters as a fourth or fifth-instar larva. The larva resume feeding in spring and continues until May or June. The pupal stage lasts about 21 days and occurs between May and July. Adults fly in late spring and summer. The caterpillar has a brown head with a cream-colored herringbone pattern on each lobe, a bright green body with a thin dark green middorsal stripe, a white subdorsal stripe and a white spiracular stripe. Larva reach a length of 25 mm.