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. The larva then moves to another leaf, forming a broader mine. Both mines can pucker the blade. Initially, larvae mine downwards in long, thin mines with frass piled at the top. They remain in these mines over the winter (as pictured here on Brachypodium sylvaticum, and either extend them downwards or begin mining a new leaf in a similar way in the spring. Adults reared.

Data: 29.xii.2022, Watchet, South Somerset, VC5

Image:© Will Langdon