| Charidryas acastus (W. H. Edwards, 1874) |
| Status: Rare local resident. |
| Flight Period(s): There is but a single brood northward, but Marrone (2002) reports it to be double brooded in South Dakota. In Nebraska dates range from 21 July -. |
| Range: This species has been found from southern portions of Alberta and Saskatchewan south through the western Dakotas, Montana, Wyoming and the western halves of Colorado and New Mexico and west through Utah, Arizona and Nevada to southeastern California. In Nebraska it has been found in Sioux County. |
| Larval Hostplant(s): An Aster (Machaeranthera canescens). Rabbit Brush is also cited, but not the species occurring in Nebraska. |
| Overwinter: As a caterpillar. |
| Commentary/Habitat: This species typically inhabits dry habitats including gulches, hilly shortgrass prairies and sagebrush areas. It has only been found on several occasions and then never by more than an individual or two. |
| Similar Species: None |
