Lifestyle:
Unknown.
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:
The larvae are almost certainly not leaf-miners but probably feed
internally either in stems of flower-heads (Spencer, 1972b: 61).
Hosts in Great Britain and Ireland: Currently unknown.
Hosts
elsewhere: Currently unknown.
Time
of year - larvae: Currently unknown.
Time
of year - adults: June, August.
Distribution
in Great Britain and Ireland: Uncommon. Stafford (Madeley),
Brecknock (Cusop) (Spencer, 1972b: 61); Breconshire, Glamorganshire, Radnorshire and South-west Yorkshire (NBN
Atlas). Distribution elsewhere: Widespread in continental Europe including Austria, Denmark, Finland,
Norway and Sweden (Spencer, 1976:
295), ? Corsica, Estonia, Germany, Lithuania and Poland (Fauna Europaea).
Also
recorded from East Palaearctic (Fauna Europaea), U.S.A. and Canada (Spencer,
1976: 295). NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
Currently unknown.
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