Leaf-mine: A short irregular linear mine with frass in more or less connected
threads (Spencer, 1976: 238).
long, upper-surface, little branched corridor; loops close together.
Frass in pearl chains or strings. Pupation outside the mine (Bladmineerders van Europa).
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 de Meijere (1937: 199, as Liriomyza
sp. on Centaurea jacea); posterior spiracles each with 8-10
bulbs (Spencer, 1976: 238).
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).
Yellow (Paklaniskis, 1994a).
Hosts in Great Britain & Ireland:
of year - mines: June-October.
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including
Surrey (Box Hill), Middlesex (Scratch Wood), Buckinghamshire (nr
Tring), Cambridge (Chippenham Fen), Glam (Cefn Rhigos), Denbighshire
(Cefn-y-bedd), Aberdeen (Den of Pitlurgh), Sutherland (Loch Assynt)
(Spencer, 1972b: 55), Warwickshire
(Kingsbury) (Robbins, 1991:
122); Cambridgeshire (VC29), East Sussex (VC14), Middlesex (VC21), Shropshire (VC40), South Wiltshire (VC8), Stafford and Worcestershire (VC37) (NBN
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elsewhere: Common and widespread in much of Europe, including
Denmark, Norway, Sweden (Spencer,
1976: 238), The Netherlands, Luxembourg (Bladmineerders van Europa), Germany (Spencer,
1976: 558), Estonia, European Turkey, French mainland, Hungary,
Italian mainland, Lithuania, Poland, Slovakia and Spanish mainland
(Martinez in Fauna Europaea).
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British and Irish Parasitoids in Britain and elsewhere: