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Not sure about these. Iolas Blue is a very large blue. If these were large, then Iolas is probably ok. I have to say, though, that they look rather like one of the much smaller Cupido sp. Also, did you see anything of the larval foodplant, Bladder Senna?
You are right; they are not large enough to be Iolas Blue. I did not see Colutea. Thanks for the identification.
Lat/Lng: 46.4206, 11.7648