Hi Paul,
No. 2 is definite
argus. The extent of the dark on the upperside hindwing rules out
idas.
No. 3 is almost certainly
argus. The dark extends at least as a dusting into s. 6.
No. 4 shows nothing definitive but would undoubtedly be
argus if seen in Switzerland, both from the upperside and underside. I've never seen
idas look anything like that.
No. 5 I don't like to call. I've seen that upperside jizz in both species but most commonly in
argus.
The same goes for no. 6 - I have a preference for
argus in both cases but cannot be certain. In Switzerland at least,
idas has a clear blue s.6 on the upperside hindwing.
Idas also rarely has the obscure inner edge to the dark forewing margin and is generally a neater insect. The problem is, both species are incredibly variable. We have at least two rather different subspecies in Switzerland alone.
Traplican, your
argyrognomon are definitely that (at least, the underside views) and the
argus in the last shot is also
argus.
Argyrognomon is the easiest of the lot to identify if a good underside view is had. Of course,
pylaon can mess things up where present, because that's another very variable species (probably at least three species in Europe...). We're lucky in Switzerland that our subspecies/species
trappi is easy, as Paul will remember from his last trip here.
Guy