Hardy's butterflies

[Patrick Roper]

Maxwell Barclay, a coleopterist at the Natural History Museum, London,
in an e-mail talking about some of the entomological aspects of the
writing of Thomas Hardy, especially the 'Return of the Native', makes
the following comment: "Hardy also refers to the 'amber coloured
butterflies' that only Egdon (his giant West Country heath) breeds';
what these could be is not for me as a
coleopterist to guess. Perhaps Heath Fritillaries?"

What were Hardy's 'amber coloured butterflies'?

Patrick Roper