Food Plant: Populus tremula (Aspen)  

Egg: On leaf-stalk

Mine: July - November

Notes: Gall in petiole, later mine in leaf-blade, in “green island". The cocoon is formed outside the mine - in this case on the leaf (As shown)

Data: 13.iv.2006, Fleet, Hants, VC12

Image:© Rob Edmunds