Leaf-mine: A long, narrow, upper surface mine widening at the end and with frass in conspicuous black strips. Pupation normally takes place on the ground but the puparium not infrequently remains in the exit slit at the end of the mine (Spencer, 1976: 370, 371 (fig. 645)).

Upper surface corridor from start to end. The frass liquifies partly, forming a a broad dark-brown central band. Pupation mostly outsaide the mine, but the puparium may often be found within. In that case often an untidy exit slit has been formed; the anterior spiracles do not penetrate the epidermis (Bladmineerders van Europa).

A long upper surface gallery. Frass broad, linear, conspicuous and black (British leafminers).

Larva: The larva is described by de Meijere (1926).

Puparium: Yellowish-brown; posterior spiracles each with some 17 bulbs (Spencer, 1976: 370).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: July-November.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Probably widespread. Kent (Darenth), Sussex (Southlease), Devon (Wonwell), Norfolk (Norwich) (Spencer, 1972: 95), Warwickshire (Coventry and Kingsbury) (Robbins, 1991: 63); East Suffolk, Hertfordshire, Huntingdonshire, Middlesex, North Somerset, Shropshire, South-west Yorkshire, Stafford, Surrey and Worcestershire (NBN Gateway - 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).

Also recorded in the Republic of Ireland (Martinez, 2007 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 the Belgium (de Bruyn and von Tschirnhaus, 1991), Germany (Spencer, 1976: 370), The Netherlands, Luxembourg (Bladmineerders van Europa), Austria, Belarus, ? Corsica, Czech Republic, Denmark, European Turkey, French mainland, Iceland, Italian mainland, Lithuania, Madeira, Poland, Sardinia, Slovakia, Spanish mainland, Sweden and Switzerland (Martinez, 2007 in Fauna Europaea).

Range extending eastwards to the Kirghiz Republic of the [former] U.S.S.R. (Spencer, 1976: 370).

Also recorded in Canada and the U.S.A. (Spencer, 1976: 370).

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

Parasitoids in Britain and elsewhere: