Leaf-mine: The mine begins as a narrow corridor, somewhere halfway along the leaf; it ascends towards the tip, doubles, and descends to about the starting point. Meanwhile the corridor has widened to about half the width of the leaf. Most frass is accumulated as an elongate dark mass in the oldest part of the mine. According to Traugott-Olsen and Nielsen part of the frass can be ejected through an opening in the lowest part of the mine. The mine is greenish white and quite conspicuous. Pupation external; pupa in a loose spinning (Bland, 1996a; Traugott-Olsen and Nielsen, 1977a) (Bladmineerders van Europa).

Larva: Pale greenish yellow with an indistinct dorsal line; head pale yellow, mouth parts darker. The eye patch consist of several facets (contrary to Eutomostethus luteiventris) (Bladmineerders van Europa).

Pupa: Details unknown.

Adult: Not illustrated in UKMoths (check for update). The genitalia are not illustrated by the Lepidoptera Dissection Group (check for update).

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: March-May (Bladmineerders van Europa).

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Britain including Anglesey, Caernarvonshire, Denbighshire, East Suffolk, Flintshire and South Hampshire (NBN Gateway, as Biselachista scirpi - N.B. includes Watsonian Vice Counties having publicly available records that fall within or overlap the vice county border at 10km resolution or better i.e. a record for a vice county may relate to an adjacent vice county - for included datasets see NBN Grid map below) and the Channel Is. (Karsholt and van Nieukerken in Fauna Europaea).

Also recorded in the Republic of Ireland (Karsholt and van Nieukerken in Fauna Europaea).

NBN Grid map: Note that not all datasets on the NBN Gateway may be available on the map below. If you are an NBN Gateway registered user you can request access for missing datasets via the link 'Open interactive map in new window' below.

Distribution elsewhere: Widespread in continental Europe including Austria, Belgium, Danish mainland, Finland, Germany, Hungary, Italian mainland, Norwegian mainland, Portuguese mainland, Romania, Sardinia, Sicily, Sweden and The Netherlands (Karsholt and van Nieukerken in Fauna Europaea).

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: Unknown.