Food Plant: Brachypodium sylvaticum (False Brome), Bromus erectus (Upright Brome) and other Gramineae (Grasses).

Egg:  Often two or three close together on the upper side.

Mine: November-May; July.

Pupa: Attached to leaf or stem with silken girdle.

Notes: Initially a narrow brownish mine with blackish frass at its base (as shown). The larva then moves to another leaf, forming a broader mine. Both mines can pucker the blade. Mine shown on Brachypodium sylvaticum (False Brome). A younger mine is shown with the frass piled at the bottom and the larva mining upwards.

Data: 24.iv.2022, Hill Lane, Aston Rowant, Oxfordshire, VC23.

Image:© Will Langdon