A smaller moth having a wingspan of around 20 mm. The forewings above are quite pretty, being sulphur yellow with a light purplish Y overlaid with lead colored scales. The hind wings are off white in color, slightly tinged with yellow on the outer margin. The projecting labial palps are characteristic of the Pyralidae sens lat. Described by Charles Henry Fernald (1838-1921), Professor of Zoology at Massachusetts Agricultural College, in 1888 as Botis plumbosignalis on the basis of Colorado material.