Identification: Blotchy golden brown forewing with prominent white/silver stigmata. Stigmata of P. nichollae more oval, with stigmata usually not crossing the cubital vien.
Wing Span: 3.0 - 4.0 cm
Flight: Adults are nocturnal, recorded from late May to early September
Range: Aleutians of Alaska south to San Francisco Bay area of California.
Taxonomy Notes: None.
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