Food Plant: Hypericum (St John's Wort) 

Egg: Lower surface of the leaf

Mine: July, October - December (occasionally late August - early September)

Notes: A gallery with linear frass, leading to a blotch. The intial gallery may become masked as the blotch develops (as shown),

Data: 21.viii.2014, Methwold Warren, Norfolk, VC28

Image:© Rob Edmunds