Crambidia casta, the pearly-winged lichen moth, is a moth of the family Erebidae.

In the west it occurs from the Rocky Mountain states south to central Arizona and New Mexico.

The habitat consists of eastern hardwood forests, juniper woodlands and sagebrush rangelands The wingspan is about 30 mm.

The larvae feed on lichens.

This Lithosiina-related article is a stub.