mine, becoming a blotch. Two or more larvae feeding together. Frass
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
Larva: The larvae of flies are leg-less maggots without a head capsule (see examples). They never have thoracic or abdominal legs. They do not have chewing mouthparts, although they do have a characteristic cephalo-pharyngeal skeleton (see examples), usually visible internally through the body wall.
The larva is described by Vos-de Wilde (1935)
and illustrated in Bladmineerders van Europa and British
Puparium: The puparia of flies are formed within the hardened last larval skin or puparium and as a result sheaths enclosing head appendages, wings and legs are not visible externally (see examples).
The puparium is described by Stork (1936)
and illustrated in (Bladmineerders van Europa) and British
Comments: The mine, pupa and adult are illustrated in the the British Leafminers Newsletter.
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 Great Britain & Ireland:
of year - mines: June-July, September, November.
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including
Warwickshire (Barston and Sutton Park) (Robbins,
1991), Hampshire (Fleet) (British
leafminers); Berkshire (VC22), Breconshire (VC42), Buckinghamshire (VC24), Cambridgeshire (VC29),
East Kent (VC15), East Sussex (VC14), Glamorganshire (VC41), Monmouthshire (VC35), North Hampshire (VC12),
North Somerset (VC6), North Wiltshire (VC7), Oxfordshire (VC23), Pembrokeshire (VC45), Shropshire (VC40),
South Devon (VC3), South Hampshire (VC11), South Lancashire (VC59), South Somerset (VC5), Staffordshire (VC39),
Surrey (VC17), Warwickshire (VC38), West Kent (VC16), West Norfolk (VC28), West Suffolk (VC26) and
Worcestershire (VC37) (NBN
recorded in the Republic of Ireland (Michelsen in Fauna Europaea).
NBN Grid Map:
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 Grid Maps of known host species:
patientia subsp. orientalis, Rumex
British and Irish Parasitoids in Britain and elsewhere:
|Lamprotatus splendens Westwood, 1833 [Not in UCD, see Yu, 2012]
|Adelurola florimela (Haliday, 1838)
|Phaenocarpa ruficeps (Nees, 1812)
|Apodesmia irregularis Wesmael, 1835
|Apodesmia rufipes (Wesmael, 1835)
|Biosteres carbonarius (Nees, 1834)
|Biosteres haemorrhoeus (Haliday, 1837)
|Biosteres placidus (Haliday, 1837)
|Biosteres spinaciae (Thomson, 1895)
|Biosteres wesmaelii (Haliday, 1837)
|Diachasma fulgidum (Haliday, 1837)
pallipes Wesmael, 1835
|Phaedrotoma munda (Förster, 1862)
|Utetes testaceus (Wesmael, 1838)