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A medium-size (approx. 3.5-4.5 cm wingspan) moth with yellow-tan forewings and white hindwings. The forewings have a long thin black basal streak extending to a mall black discal dot, and bordered on the upper side by a white line. The veins are all lined with white and the spaces between are filled with narrow parallel yellow brown and darker brown lines. Darker scaling also forms a streak from the discal dot to just below the apex, and another, broken streak just above and parallel to the lower margin. The normal lines are reduced to two or three black dots indicating the postmedian line. The hindwings are pearly white shading to a narrow dark margin, with whitish fringe. Antennae simple and sexes similar. The collar is crossed by three gray lines. The combination of dark streaks on the forewing and white hindwings will identify multilinea.

A widespread distribution, from the Canadian maritime provinces west to BC, south throughout much of the USA. In Alberta it is found throughout the Parklands and lower areas of the mountains, but appears to be absent in the arid Grasslands and Boreal forest areas.