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An early butterfly
Published in Entomologist's Record and Journal of Variation, in 1971, in volume 83, pages 71
Mostly South Essex, 1970
Published in Entomologist's Record and Journal of Variation, in 1971, in volume 83, pages 143-147
Dingle, 1971
Published in Entomologist's Record and Journal of Variation, in 1971, in volume 83, pages 343-346