Hesperia juba, the Juba Skipper, can be found in WA,OR,CA,ID,WY,NV,AZ,NM,UT,SD,NE,OK,SD.
Favorite nectar plants include: Apocynum androsaemifolium, Buddleja, and Liatris
USDA Growing Zones for these plants include: 4,5,6,7,9

Host plants:
Bromus rubens
Deschampsia elongata
Poa pratensis
Stipa

PD image courtesy of
Robb Hannawacker