Thank you Peter and Olivier for all the wonderful shots and the time it took to get them. Simply marvelous material throughout -- as always. Nice varied coverage as well. Quite a few very special things there among the photographs.
I noticed this pair which I believe are Papilio machaon in Vladimir's box of splendid rare Parnassius. The species in this box were not labelled, can anyone suggest what this taxon is priced at 1000 euros!! I did not crop the image down further as you will get a thumbnail.
Yes, these appear to be ladakensis although underside photos (not possible, I know) and data would help to confirm this. This is the high altitude short tailed machaon from NW Himalayas across to the Pamir range.
Dunc's hookeri (sikkimensis is a junior homonym and thus not the valid name for this taxon) is quite different, although both have short tails and occur at high altitude, hookeri is found from central Himalayas eastwards to NW Yunnan. It is likely that hookeri could actually belong to a separate species to true machaon. Note that they are easily distinguished from ladakensis by the double black chevron above the red eye spot on the anal angle of the hindwing. In ladakensis there is only a single black chevron, like European machaon.