Food Plant: Alnus glutinosa (Alder), A.incana (Grey Alder)

Mine: June-September

Notes: The mine formed in the leaf-veins and midrib leads to an oval blotch, then a cut-out in leaf-blade (as shown). 

Data: 15.vii.2018, Rodden Nature Reserve, North Somerset, VC6

Image:© Jenny Vickers