Leaf-mine: Larva forming an irregular upper surface linear mine, which can widen and become almost blotch like at end (Spencer, 1972: 78 (fig. 262), 81; Spencer, 1976: 378, 379 (fig. 657)).

Upper-surface blotch, often following the leaf margin for some length, finally strongly widened. The real start of the mine, however, is a long narrow epidermal corridor in the lower surface of the leaf, made by the first instar larva (Allen, 1956a). Pupation outside the mine, exit slit generally in the leaf lower epidermis (Bladmineerders van Europa).

An upper surface mine, which can widen and form a blotch (British leafminers).

Larva: The larva is described by Allen (1957b), Griffiths (1973c), de Meijere (1938) and illustrated in Bladmineerders van Europa.

Puparium: Black; posterior spiracles each with 22-28 bulbs or bulbs (Spencer, 1976: 378).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: May, July-September, November.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread throughout Britain from Cornwall to Scotland (Spencer, 1972: 81), Warwickshire (Ufton) (Robbins, 1991: 66); Cambridgeshire, Cheshire, Derbyshire, Mid-west Yorkshire, North Ebudes, North Lincolnshire, South-west Yorkshire, Stafford and Surrey (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: 81).

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: 378), Belgium (de Bruyn and von Tschirnhaus, 1991), Germany (Spencer, 1976: 378), The Netherlands (Bladmineerders van Europa), Austria, Bulgaria, Czech Republic, French mainland, Lithuania, Poland and Slovakia (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: