Wingspan 5 to 6 mm. The adult moths have a silvery fascia and a bronzy tinge to the inner part of the wing. The larva mines the leaves of Elm with the exit slit on upper surface.

Adult Leafmine

Areas where the larval foodplant occurs.

There are two generations, with adults in May and August.

The larval stage mines the leaves of Elm (Ulmus) including Wych Elm (U. glabra). It forms a narrow gallery almost filled with frass, often following the leaf margin. The mines occur from late June to July and September to October.

Distributed throughout the British Isles, although becoming scarcer further north. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as common.

Occasional in Leicestershire and Rutland. L&R Moth Group status = C (very scarce resident or rare migrant).

http://www.leafmines.co.uk/html/Lepidoptera/S.lemniscella.htm

https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/lepidoptera/monotrysia/nepticuloidea/nepticulidae/stigmella/stigmella-lemniscella/