Larva feeding internally in the pith of stems, more rarely forming
a true mine in the outer parenchymatous tissue (Spencer,
1976: 412; Spencer, 1990:
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).
Yellowish, elongate, deeply segmented; posterior spiracles each
with an ellipse of 30-32 bulbs around a minute central horn (Spencer,
Hosts in Great Britain & Ireland: Currently unknown.
of year - larvae: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: Added to the British checklist
by Bland (see Chandler, 1998).
Anglesey (VC52), Caernarvonshire and East Ross (NBN
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Distribution elsewhere: Widespread in continental Europe including Austria, Denmark and Germany
(Spencer, 1976: 412); Martinez in Fauna Europaea).
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British and Irish Parasitoids in Britain and elsewhere: