Food Plant: Quercus (Oak), Castanea (Sweet Chestnut).

Egg: Underside of leaf

Mine: June - July, September - October

Notes: The gallery is long and broad, frass dispersed in later part of mine. Mine shown on Oak, with larva, and is unusual as it is a shorter mine with a subsequent atypical frass pattern. Adult bred to identify - emerged 22.viii.2025

Data: 04.viii.2025, Llandaff North, Cardiff, Glamorgan, VC41

Image:© George Tordoff