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A medium-size (3.8-4.4 cm wingspan) moth with pinkish-maroon forewings and dirty white hindwings. The forewings are frosted with patches of grey and white scales, particularly in the basal area, along the lower margin and around the reniform. The orbcular and large reniform are also flled with pale scales, with a ring of dark ones in their centers. The subterminal line is strongly bordered distally with white scale, and the veins on the outer half of the forewing are lined with dark scales. The fringe is dark, except for a small white patch marking each vein. The hindwings are dirty white, with sooty-brown scales lining the veins and forming a dark shade along the outer edge. Similar colored species include Sideridis maryx, S. rosea and Melanchra picta.

Southern New York north and west to southern P.Q. and Ontario west to central Alberta; south to Kansas and Colorado in the west and Ohio in the east. In Alberta it is local in the arid shortgrass prairie region and in the badlands; there is also an old specimen record from Edmonton.