Verrill's underwing (Catocala verrilliana) is a moth of the Erebidae family. It is found from Washington and Oregon to Colorado and south to California, Arizona and Texas, and Cimarron County in western Oklahoma. The wingspan is 45–60 mm. Adults are on wing from May to September depending on the location. There is probably one generation per year. The larvae feed on Quercus macrocarpa, Quercus alba, and Quercus garryana.