Apodemia mormo nr tuolumnensis
This metalmark ranges from Santa Barbara Co. to the area northeast of Big Bear Lake in San Bernardino Co. and flies only in the fall. The single brood is on the wing late August to late September and overwinters as an egg. In Holcolm Valley and to the east, it is sympatric with spring-flying pratti and uses Eriogonum microthecum (per John Emmel). I've seen this one while hiking along the PCT east of Van Dusen Road in patches of E. fasciculatum that (apparently - need to revisit this assumption) support nominate virgulti.
This is about as far east as this butterfly ranges. In the Sugarloaf Mountain/Onyx Peak area to the southeast, we have the very dark "nr. mormo" on wrightii. Between the two is a large blend zone.