Catocala moderna, n. sp.

Allied to C. viduata, Guenée, but very much smaller, and at once distinguished by the pale angulated band of the under surface of hind wings reflecting through on upper surface, where it appears as a faintly yellowish mesial shade, distinctly outlined. Fore wings like C. viduata, of the same pale gray, with the black oblique shading running from costa at centre of median space outwardly to below apices, less marked than in its ally. Subreniform paler, more yellowish. Else the lines and markings copy in miniature its ally. Fringe to secondaries white. Collar darker, with black line; thorax pale gray.