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unsilvered Speyeria hesperis
In my experience, S. hesperis with unsilvered ventral hindwings are rare in Canada.
I remember only collecting 2 such specimens; one in prairie Alberta and one in
Purcell Mtns of British Columbia. Here are mug shots: https://flic.kr/p/2nZDrFc
Calgary, Alberta, Canada (elevation 1060 metres asl)
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