Northern Prairie Wildlife Research Center
Wingspan 3.1 cm. The wings are brown, speckled with black, and show amorphous grey-black markings. This geometrid is common and widely distributed in western North America. Moths fly in spring. Caterpillars of all species of Drepanulatrix feed only on the foliage of species of Ceanothus.
Similar species: Drepanulatrix hulstii is larger, hindwing pale gray-brown, moths fly in midsummer; Apodrepanulatrix litaria (Geometridae) is larger, hindwing dark gray brown, moths fly in fall.