Leaf-mine: Linear mine, becoming a blotch. Two or more larvae feeding together. Frass in lines.

At the start of the mine on the leaf under surface a group of about 5 oval white egg shells (just 1 on the small leaves of Rumex acetosella). The emerging larvae initally work shoulder to shoulder in making a broad corridor. Later they split up, making a large blotch, that often is enlarged even more by fusion with other mines. The mine is practically full depth. Frass blackish-green, often deliquescent. The larvae can leave a mine and restart elsewhere. Pupation outside the mine (Bladmineerders van Europa).

The mine starts as a short corridor on the lower surface and then becomes a large upper surface blotch . Several larvae can mine together (British leafminers).

Larva: The larva is described by Vos-de Wilde (1935) and illustrated in Bladmineerders van Europa and British leafminers.

Puparium: The puparium is described by Stork (1936) and illustrated in (Bladmineerders van Europa) and British leafminers.

Pegomya solennis puparium Image: Willem Ellis (Bladmineerders van Europa)

Comments: Records of Pegomyia versicolor on Heracleum (Robbins, 1991) and ? H. sphondylium (Ackland in Chandler, 1978: 228) are discounted by Griffiths (1982) as probable misidentifications of the tephritid Euleia heraclei. Ackland in Chandler (1978) did not indicate whether his host records were British or Foreign and are therefore included under 'Hosts in Britain' and 'Hosts elsewhere

Hosts in Britain:

Hosts elsewhere:

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

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread in Britain including Warwickshire (Barston and Sutton Park) (Robbins, 1991), Hampshire (Fleet) (British leafminers); Berkshire, Brecon, Buckinghamshire, Cambridgeshire, East Kent, East Sussex, Glamorgan, Monmouthshire, North Hampshire, North Somerset, North Wiltshire, Oxfordshire, Pembrokeshire, Shropshire, South Devon, South Hampshire, South Lancaster, South Somerset, Stafford, Surrey, Warwickshire, West Kent, West Norfolk, West Suffolk 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 (Michelsen, 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 Netherlands, Luxembourg (Bladmineerders van Europa), Belgium (Gosseries and Ackland, 1991; de Meijere, 1939), Austria, Balearic Is., Crete, Czech Republic, Denmark, Finland, French mainland, Germany, Greek mainland, Hungary, Italian mainland, Latvia, Norwegian mainland, Poland, Russia - Central, North and Northwest, Sicily, Slovakia, Sweden, Switzerland and Ukraine (Michelsen, in Fauna Europaea).

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

Parasitoids in Britain and elsewhere: Unknown.