This may be the first photo taken of an iris pupa in the wild in the UK. The pupa was found a short distance from where the larva had been seen last weekend and was approx 4m above ground level.
Alternatively, try spotting the pupa in this photo -
I also found a full grown larva today, 23rd June, so they haven't all pupated -
In 1977 I found a full grown larva in Alice Holt on 24th June. That year the adults started there on 23rd July.
I think that, given relatively decent weather, the first adults will start at the earlier sites around 5th July and a few days later (maybe the 10th) elsewhere. If we get prolonged good weather they will appear earlier. Alternatively, they may not appear before mid July...