www.ukbutterflies.co.uk

near the black sea coast 3 weeks ago.

For me it looks like Reverdin´s Blue ( P. argyrognomon )

I see what John means, but I'd go for idas. Female argyrognomon typically has clean fringes, while these are dirty brown. The shape of the hindwing black crescents also suggests idas.

This is a female argyrognomon:



For comparison, a female idas, showing similarly broad orange on the forewing:



Guy