Leaf-mine: A narrow linear mine in the first instar, later producing a large irregular whitish blotch with conspicuous black frass. Pupation external (Spencer, 1972: 47 (fig. 144), 50; Spencer, 1976: 297 (fig. 536), 298).

Long untidy corridor that irregularly widens and narrows. Frass in lumps, strings or thread fragments. Pupation outside the mine (Bladmineerders van Europa).

The larva forms a narrow linear mine in the first instar, later producing a large irregular whitish blotch with conspicuous black frass (British leafminers).

The mine is also illustrated in the Encyclopedia of Life.

Larva: The larva is described by de Meijere (1925, as impatientis), Dempewolf (2001: 129) and illustrated in Bladmineerders van Europa.

Puparium: Reddish-brown; posterior spiracles each with 3 bulbs (Spencer, 1976: 298).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: July-August.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread. London (Hampstead) and Westmorland (Grasmere) (Spencer, 1972: 50), Surrey (Box Hill) (pers. observation), Warwickshire (Robbins, 1991: 38); Cumberland, East Cornwall, East Sussex, Merionethshire, North Hampshire, North Somerset, Shropshire, South-west Yorkshire, Stafford, Surrey, Warwickshire, West Gloucestershire, Westmorland 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 Ireland (Spencer, 1972: 50).

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 Denmark, Finland, Norway, Sweden (Spencer, 1976: 298), The Netherlands, Luxembourg (Bladmineerders van Europa), Belgium (de Bruyn and von Tschirnhaus, 1991), Germany (Spencer, 1976: 562; Dempewolf, 2001: 129), Czech Republic, Lithuania, Poland, Romania, Slovakia, Switzerland and Ukraine (Martinez in Fauna Europaea).

Described from the U.S.A. (Loew, 1869a: 48) and recorded in Canada (Spencer, 1969a: 178).

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

Parasitoids in Britain and elsewhere: