Claim: Neoploca, a genus of moths found in Japan, Korea, the Russian Far East, and China, have silvery grey forewings and shining sordid white hindwings while its larvae feed on Quercus mongolica.
Evidence: Neoploca is a genus of moths belonging to the subfamily Thyatirinae of the Drepanidae. It contains only one species, Neoploca arctipennis, first described by Arthur Gardiner Butler in 1878, which is found in Japan, Korea, the Russian Far East and China (Jilin, Inner Mongolia, Shaanxi, Jiangsu). The forewings are silvery grey, the base, a central irregular black edged band, a transverse discal stripe and the outer border are rather paler and greyer than the rest of the wing. The hindwings are shining sordid white, with a broad, pale brown external border. The larvae feed on Quercus mongolica.