About Catocala semirelicta Grote, 1874
Catocala semirelicta, commonly known as the semirelict underwing, is a moth that belongs to the family Erebidae. This species was first formally described by Augustus Radcliffe Grote in 1874. It is distributed across North America, ranging from Nova Scotia, Nevada, Colorado, Utah, and California south to Maine, extending west across Canada to British Columbia, and occurs further south in mountain regions. The forewings of this moth reach an approximate length of 30 mm, and its total wingspan measures between 65 and 75 mm. Depending on location, adult moths are active from July to September, and the species has one generation per year. The larvae of Catocala semirelicta feed on Populus balsamifera, Populus tremuloides, and various Salix species.
