Very interesting pictures, Paul!!
The second picture, of the mating pair, seems to be
parthenoides to me. All the classic signs are there - the broken pd line, the oblique mark in s1. The male underneath looks darkly marked but this is a very variable species and there are darker forms in the Pyrenees.
The first picture looks like a male
parthenoides, though I've never seen such a completely marked one. The mark in s1 is distinctly oblique and the hindwing shows much open space. My knee jerk reaction was
parthenoides and although details worry me that remains my theory.
As for the last one (I presume ups and uns of the same butterfly), what a weird insect!! I find it impossible to place confidently. I've never seen a female
parthenoides looking at all like that. My experience of
deione outside Switzerland (where we have a rather particular form,
berisalii) is quite limited but she looks all wrong for that to me. This is a female
deione from the central Pyrenees:
Note the pale, straw-coloured pd band. In
deione the uns markings are typically creamy rather than white, too.
I am really uncertain what this is - and look forward to someone else's opinion! The two most likely possibilities seem to me to be
athalia or a variant of
diamina. Remember that in the Pyrenees
diamina is quite different from the Alpine forms. Although this doesn't look like
vernetensis it may be some other variant.
I concede defeat on that one! It is nearly midnight here, though, so perhaps I should take another look in the morning!
Guy
EDIT - comparing your pictures 2 and 3 I can't rule out a rather dark female
parthenoides either. Mmm...