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A medium-size (3.3-3.5 cm wingspan) moth with orange-brown or less commonly grey-brown or brown forewings, and dull black hindwings with light red-brown fringe. The small dark orbicular and more prominent dark reniform usually stands out against the ground. The lines, and in particular the antemedian and postmedian lines are doubled and indicated by an incomplete series of dark scales. The terminal area is the same color but lighter than the rest of the wing, and is usually separated from the rest of the wing by a dark shade or line. Some specimens are speckled with darker scales, especially on the basal half. Antennae simple. Sexes are alike except that females (as illustrated) have a wide, flattened abdomen. Similar to reddish forms of placida, but lacking the median shade crossing the forewing in placida, and with different genitalia. Specimens of trigona are usually smaller, have a shorter and more angular wing and are a lighter shade of orange. Some specimens of cupida may be nearly impossible to separate from similar forms of brunneipennis, but the later are usually a darker glossy red-brown color. Questionable specimens must be identified by genitalic characters. Adults and genitalia of both sexes are illustrated by Lafontaine (1998)

Adults are nocturnal and come to light. There is a single annual brood with adults in late summer. Adults have been collected in Alberta from early August through mid-September. The larva was described by Crumb (1956:117) under the name “Rynchagrotis cupida, western larva”. Reported larval hosts include willow and cultivated apple, grape and peach trees, with larvae reportedly causing damage to buds and new growth on the fruit trees (Rings et al, 1992).