Parnassius smintheus sayii W. H. Edwards, 1863
Status: Rare western resident, possibly extirpated
NENHP Ranking: S1, Tier 2
Range: This species is found from western Alaska southeast to northern New Mexico. It has been recorded from the westernmost panhandle counties in Nebraska.
Broods/Flight Times: One early summer flight from mid June to mid July
Larval Hostplant(s): Stonecrop (Sedum lanceolatum).
Habitat: Old literature and specimens in the University of Nebraska – Lincoln collection suggest this species was common in the Sioux County canyonlands in the early 1900s.
Found at: Gilbert-Baker SWMA
Overwintering: As an egg or partially grown larvae
Notes: It is now extremely rare, if it exists in the state at all. The most recent record (from the late 1980’s) is from the mouth of Monroe Canyon north of Harrison where the hostplant grows in the road cut.