Abstract
Schinia immaculata, new species, is described from riparian habitats along the Colorado River in
the Grand Canyon. Habitats include the shoreline, new high water dominated by tamarisk (Tamarix
sp., Tamaricaceae), and old high water characterized by mesquite (Prosopis sp., Fabaceae), acacia
(Acacia sp., Fabaceae), and desert shrubs. Adult and male genitalia are illustrated and compared
with Schinia biundulata Smith.