While I recognize the fact that each one of us has a right to make lists of insects to suit himself, and others are not obliged to follow them, errors of identity are not a matter of opinion, and are therefore subject to criticsm. With this view wish I to point out a few errors in the genus Catocala in Prof. John B. Smith's new “List of Lepidoptera.” First, var. Virens, French, is not a variety of Cordelia, Hy. Edw., but of Amasia; and Cordelia is not the one figured by Dr. Strecker, pl. 9, p.12.