Catocala antinympha

Catocala antinympha, the sweetfern underwing, is a moth of the family Erebidae. It is found from Quebec and Ontario east to Nova Scotia and south to Connecticut, Rhode Island, New York, Massachusetts, Pennsylvania and Maryland.

Catocala antinympha
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Superfamily:	Noctuoidea
Family:	Erebidae
Genus:	Catocala
Species:	C. antinympha
Binomial name
Catocala antinympha (Hübner, 1823)[1]
Synonyms
Ephesia antinympha Hübner, 1823 Catocala affinis Westwood 1837 Catocala melanympha Guenee, 1852 Catocala multiconspicua Catocala antinympha f. paranympha Reiff, 1919

The wingspan is 45–55 mm. Adults are on wing from July to September. There is one generation per year.

The larvae feed on Comptonia peregrina.