Green, later brownish corridor or more often an elongated whitish
linear blotch overlying the midrib. The mine has short, irregular
side branches. Frass in irrgular, dispsersed grains. Pupation outside
the mine ( Bladmineerders van Europa ; Spencer, 1972b:
53 (fig. 177); Spencer, 1976:
273 (fig. 493), 275).
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 (1928).
Posterior spiracles each with an ellipse of 7-10 bulbs (Spencer, 1972b: 55).
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).
Orange; posterior spiracles each with an ellipse of 7-10 bulbs (Spencer,
Hosts in Great Britain & Ireland:
of year - mines: July, October.
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including London
(Cripplegate); Middlesex (Scratch Wood); Essex (Stanford-Le-Hope),
Norfolk (Norwich) (Spencer, 1972b: 55, as L. tragopogonis), Warwickshire (Coventry,
Holbrooks) (Robbins, 1991:
123); North Somerset and South-west Yorkshire (NBN
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elsewhere: Widespread in continental Europe including Sweden
(Spencer, 1976: 267), Germany
( Bladmineerders van Europa ; Spencer, 1976:
562), Estonia, Hungary, Lithuania and Poland (Martinez in Fauna Europaea).
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British and Irish Parasitoids in Britain and elsewhere: