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A medium sized to large crambid (24-28 mm wingspan). Forewings uniformly medium brown but ranging from ochraceous fawn to dark brown; transverse lines lacking, except occasionally a trace of a subterminal one; terminal line with 3-4 dark dots. Hind wings smoky gray to dark brown. In the male genitalia, the cucullus narrows abruptly and caudad of the base of the free arm of the costa is very narrow and tapers little (Klots 1942). All other Pediasia are lighter in color and usually slightly larger.

A North American species. Described from Rounthwaite, Manitoba, and Verdi, Nevada (Kearfott 1908). McDaniel et al. (1984) have it from South Dakota. In Alberta, Bowman (1951) reported it from the Lloydminster, Red Deer and Edmonton areas.