pupation and emergence

To add to Peter's and Matthew's results this year: I had 3 larvae which pupated on the 23rd May, 5th June, and 8th June. The average pupation time has been 20 days +/- 5 days, giving emergence dates of 14/6, 25/6, and 28/6. I released these three in a local Bucks wood a few days ago.