mothguide.com Lytrosis unitaria
PM line relatively straight. AM line tends to be weak, and median and basal areas tend to be about the same color, usually a pale gray, not yellow.
In sinuosa, the AM line has obvious waviness, the AM line tends to be strongly marked, the basal area tends to be darker than the median area, and the median area tends to be yellowish.
L. heitzmanorum is best distingished by range and by having a dark basal area. L. permagnaria is all-gray and very distinctive.