Leaf-mine: A short narrow mine, generally near apex of leaf. Larva with each segment bearing a row of characteristic papilli which are retained in the puparium (Spencer, 1976: 328). Pupation internal.

Transparent, short and narrow mine not far from the leaf tip. Frass in two rows of grains. Pupation outside the mine (Bladmineerders van Europa).

Larva: Anterior spiracles each with 7-8 bulbs, posterior spiracles each with 7 bulbs (Bladmineerders van Europa).

Puparium: Posterior spiracles each with 7 bulbs (Spencer, 1976: 328).

Comments: Pseudonapomyza europaea is treated as a junior synonym of Pseudonapomyza atra in Bladmineerders van Europa.

Festuca gigantea is treated as Schedonorus gigantea (Giant Fescue) by Stace (2010).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: May-June, August.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread, but local, in south of Britain including London (Wood Green), Kent (Otford and Wrotham), Middlesex (Scratch Wood), Surrey (Box Hill), Buckinghamshire (Ivinghoe) (Spencer, 1972: 69), Warwickshire (Binley) (Robbins, 1991: 141); Cambridgeshire, Cumberland, Glamorgan, Monmouthshire, North Somerset, Surrey, West Gloucestershire, West Kent, West Suffolk and Westmorland (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: Widespread in continental Europe including Austria, Germany, Hungary, Denmark, Finland, Sweden, Yugoslavia (Spencer, 1976: 328), The Netherlands (Bladmineerders van Europa), Belgium (de Meijere, 1924; de Bruyn and von Tschirnhaus, 1991), Azores, Belarus, Bulgaria, Canary Is., Czech Republic, Estonia, European Turkey, French mainland, Hungary, Italian mainland, Latvia, Lithuania, Madeira, Poland, Romania, Slovakia, Ukraine and Yugoslavia (Martinez in Fauna Europaea).

Also recorded in Canada (Spencer, 1969a: 209).

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

Parasitoids in Britain and elsewhere: