A medium-size moth with dull greenish or purple grey forewings. The antemedial line is black and distinct, the other cross-lines less so, mainly indicated by dark marks at the costa. The basal dash is indistinct or absent. A short dark dash in the outer fold, with some dark red-brown scaling adjacent. The hindwings are bright yellow-orange, with a median black band that forms a long loop with the basal streak. A wider black terminal band, divided or nearly so in the anal area, forming a dark, anal spot. The antennae are simple and both the sexes are alike. It can only be mistaken with
Catocala blandula, which has much more mottled grey, black and whitish forewings. Canadian populations, which are darker and duller than more southern ones, were previously treated as a separate species,
Catocala manitoba (Beut).
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