Northern Prairie Wildlife Research Center
Wingspan 3.5 cm. Forewing is pale yellow with shades of lavender and few markings except for a dark purple band across the inner margin; hindwing is white in males and brown in females. Adults of this notodontid are not as commonly collected relative to the common presence of caterpillars, widely distributed in western North America. Moths fly in midsummer. Caterpillars are known as the red-humped caterpillar and are generalist feeders on the foliage of flowering trees and shrubs, often found on oak (Quercus), snowbrush (Ceanothus velutinus), aspen (Populus), cherry (Prunus), and willow (Salix).