The Herodias Underwing' or Gerhard's Underwing (Catocala herodias) is a moth of the Erebidae family. The nominate form is found in Texas and Oklahoma. Subspecies Catocala herodias gerhardi is found from Massachusetts, Connecticut, New York to Virginia. The wingspan is 55-65 mm. Adults are on wing from July to August depending on the location. There is probably one generation per year. The larvae feed on Quercus ilicifolia and Quercus rubra.