Leaf miner found on Quercus robur on 9/23/21. Found on the same leaf as a second miner of the same species (see here: https://www.inaturalist.org/observations/117725201). Mines were upper surface blotch mines with a central white, silken nidus. Larvae would retreat to nidus when disturbed or not feeding. All frass was expelled from the mine. Larvae actively fed until early October, other larvae not captured that appeared to be the same species fed until mid to late October. Larvae overwintered in the nidus, sealing it tightly. Larvae were put in the fridge in late October 2021 and were taken out on 3/5/22. This individual was found as a fully developed pupa sticking out of its pupal chamber (the nidus) on 4/11, having popped out at some point on 4/10 or the morning of 4/11. The pupa was found dead though at this point, having apparently gotten stuck in the position shown in the photos and the adult couldn’t get out. Hope to successfully rear in the near future.
*I was hoping to keep the pupa in case I might be able to hand it off to someone who might want to barcode it however it became very moldy after a few days…