Food Plant: Populus tremula (Aspen)  

Egg: On leaf-stalk

Mine: July - November

Notes: Gall in petiole, later mine in leaf-blade, in “green island" (as shown here). The larva has a dark head and can be seen emrging from the leaf petiole to feed in the leaf.

Data: 31.x.2004, Fleet, Hants, VC12

Image:© Rob Edmunds