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Left: Mead's Sulphur (Colias meadii elis), male. Bow Summit, 7000 ft., Banff, Alta. 2.VIII.55 G.P. Holland
Right: Mead's Sulphur (Colias meadii elis), female. Pigeon Mt., Alta 12.VIII.73 F. Sperling
The Toronto Entomologists' Association thanks Agriculture and Agri-Food Canada for providing the content and computer code for this web page.