Leaf-mine: An irregular whitish, linear mine, frass in conspicuous black strips (Spencer, 1972: 72 (fig. 235), 77; Spencer, 1976: 409 (fig. 717), 410).

Wide corridor, generally upper-surface but not rarely, partly or entirely, lower-surface. Primary feeding lines distinct. Frass at first in grains, later in short thread fragments to two close rows along the sides. Pupation outside the mine (Bladmineerders van Europa).

An irregular, whitish gallery, usually upper side, but sometimes starting lower side. Frass conspicuous (British leafminers).

Larva: The larva is described by de Meijere (1926) and illustrated in Bladmineerders van Europa.

Puparium: Yellow (brown); posterior spiracles each with an ellipse of up to 13 bulbs (Spencer, 1976: 410).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: July, October.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread in Britain including London (Hampstead), Oxford (Oxford), Suffolk (Newmarket) (Spencer, 1972: 77), Hampshire (Fleet) (British leafminers), Warwickshire (Coventry) (Robbins, 1991: 41) and Edinburgh (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).

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: Common in western Europe (Spencer, 1976: 409) including The Netherlands (Bladmineerders van Europa), Belgium (de Bruyn and von Tschirnhaus, 1991), Germany (Spencer, 1976: 570), Czech Republic, French mainland, Poland and Sweden (Martinez in Fauna Europaea).

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

Parasitoids in Britain and elsewhere: