Food Plant: Alnus glutinosa (Alder), Myrica (Bog Myrtle).

Egg: Underside of leaf

Mine: August - September

Notes: A narrow mine almost filled with black frass, starting from a rough black egg-case. The larva moults within a cocoon (as shown).    

Data: 15.viii.2007, Fleet, Hants, VC12

Image:© Rob Edmunds