Leaf-miner: Mine
a very long and straight corridor, only after a change of leaf,
blotch-like. Corridor first following leaf margin, turning round
at the apex, then blotch like and running towards the leaf base.
Frass often indistinctly delimited and faded, blackish green.
The first mine that is made is a long corridor that runs along the leaf margin towards the leaf tip, then turns back and descends while becoming wider. Later mines are more or less blotchy. Frass greenish black, often somewhat deliquescent. Pupation external. (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.
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).
Comments:
Ackland in Chandler (1978)
did not indicate whether his host records were British or Foreign
and are therefore tentatively included under 'Hosts in Britain'
and 'Hosts elsewhere'.
Hosts in Great Britain and Ireland:
Hosts
elsewhere:
Time
of year - mines: Currently unknown.
Time
of year - adults: Currently unknown.
Distribution
in Great Britain and Ireland: Britain including Cambridgeshire, East Ross, North Wiltshire, Oxfordshire, Surrey and West Norfolk (NBN
Atlas). Distribution
elsewhere: Widespread in continental Europe including Andorra,
Czech Republic, Denmark, Finland, French mainland, Germany, Norwegian
mainland, Poland, Russia - Northwest, Spanish mainland and Sweden
(Michelsen in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
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