Flight: Two broods; April through June and mid July to mid September.
Caterpillar Hosts: Buckwheats (Eriogonum spp.) in the Polygonaceae.
Habitat: Dry steppe habitat, especially those with lithosol soils.
Range: The range of D. hastingsii is incompletely known because of confusion with D. mirifica. It appears most likely that it is a Pacific Northwest endemic species.
Taxonomy Notes: None.
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