White Underwing

Catocala relicta

The White Underwing or The Relict is a moth of the Noctuidae family. It is found in southern Canada, from Newfoundland to Vancouver Island, south to Missouri, and Arizona.

Black and white bands on hindwing distinctive. Forewing variable, white to gray. Thoracic area dark, as opposed to Sappho Underwing, which is white there. White Underwing is northern. The wingspan is 67–75 mm. Adults are on wing from July to September in one generation depending on the location.
Catocala relicta (White Underwing) Catocala,Catocala relicta,Erebidae,Erebinae,Geotagged,Lepidoptera,Summer,United States,White Underwing,insect,moth,underwing

Naming

Catocala relicta Walker
Catocala relicta var. phrynia Hy. Edwards
Catocala relicta var. bianca Hy. Edwards
Catocala elda Behrens
Catocala relicta var. clara Beutenmüller
Catocala relicta ab. fischeri Meyer

Catocala relicta elda, recorded from Oregon, was formerly considered a subspecies but is now thought to be a synonym of Catocala relicta.

Aberration fischeri named for Emil Fischer (1868-1954), who conducted temperature experiments on Lepidoptera producing aberrations. The name is not included in the Gall & Hawks (2010) checklist presumably because it's an experimental lab-reared aberration created under certain temperature and oxygen levels.
Catocala relicta (White Underwing) Showing the black and white bands on the hindwing. Catocala,Catocala relicta,Erebidae,Erebinae,Geotagged,Lepidoptera,Summer,United States,White Underwing,insect,moth

Distribution

Northeastern North America: Newfoundland to Pennsylvania, south to Missouri. In the west: south to central California, Arizona and New Mexico.
Catocala relicta (White Underwing) A dark form of Catocala relicta. Catocala,Catocala relicta,Erebidae,Erebinae,Geotagged,Lepidoptera,Summer,United States,White Underwing,insect,moth

Behavior

Adults are most common from July to October.

Food

The larvae feed on Betula papyrifera, Carya ovata, Populus alba, Populus balsamifera,'Populus deltoides, Populus nigra, Populus tremuloides, Quercus species, and Salix species.

References:

Some text fragments are auto parsed from Wikipedia.

https://bugguide.net/node/view/6150
Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassInsecta
OrderLepidoptera
FamilyNoctuidae
GenusCatocala
SpeciesC. relicta
Photographed in
United States of America