Catocalinae (or alternatively Erebinae) is a subfamily of moth family Erebidae (which I have yet to incorporate into the taxonomy of these galleries). Many of the species are large (7 to 10 cm, 3 to 4 inches) compared to other noctuids in temperate zones, and have brightly colored backwings. The closely related Ophiderinae and Calpinae are sometimes merged into this group.
(Source: Wikipedia)