From Fascicle 13.1A "...it is distinguished immediately by its nearly white ground color. The scaling of the wings is thin. The forewings have the basal area white. The antemedial line is represented by a brown shade, angulate in the cell. The orbicular and claviform spots are short, longitudinal, black dashes, often reduced to the point of obsolescence."
"The markings of the subterminal area are usually extensive, though rather pale brownish fuscous. The pre-apical and pretornal patches usually unite to form a broad band beyond the postmedial line. The hindwings are almost pure white, not light gray as in E. commortalis." This species has been collected in my area by J. Powell

MPG has a very good comparison photo. BG needs a page for this species.