Food Plant: Agrostis spp. (bent grass), Festuca (Schendonorus) arundinaceus (Tall Fescue), Deschampsia cespitosa (Tufted hair-grass), Brachypodium pinnatum (tor-grass), Carex spp.,

Egg: at leaf tip (singly or in groups)

Mine: February-May; July

Notes: Mines downwards from leaf tip to stem. Makes a long narrow yellowish mine. May be up to four larvae in one leaf. The larvae are yellowish with a brown head and prothoracic plate. A pupa formed on a leaf of Schendonorus arundinaceus. The silken cocoon that usually covers it has been removed for this photo.

Data: Mine collected 28.i.2023, Watchet, South Somerset, VC5

Image:© Will Langdon