Northern Prairie Wildlife Research Center
Wingspan 3.6 cm. Forewing is strongly falcate, pale yellow to red with faint markings; hindwing is white; males with filiform antennae. This noctuid is abundant in dry forests in the Pacific West. Moths fly in spring. Caterpillars feed on the foliage of chinquapin (Chrysolepis chrysophylla) and canyon live oak (Quercus chrysolepis).
Similar species: Perigonica tertia forewing is speckled with small black dots, males with pectinate antennae, abundant in oak woodlands in the Pacific West, caterpillars feed on Oregon white oak (Quercus garryana) and tan oak (Lithocarpus densiflorus).