forms a primary blotch at the tip of a leaf segment (Spencer,
brown primary blotch that may occupy an entire leaf segment. Frass
dispersed. Primary and secondary feeding lines well visible. Pupation
within 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)
and illustrated in (Bladmineerders van Europa).
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).
Hosts in Great Britain & Ireland:
of year - mines:
Larvae in July-August (Hering,
1957); mid October (Bladmineerders van Europa).
of year - adults: Currently unknown.
in Great Britain & Ireland: Banff (Glen of Drumloch) and
Inverness (Nethy Bridge) (Spencer, 1972b: 95).
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe including Denmark, Sweden (Spencer,
1976: 491), The Netherlands (Bladmineerders van Europa), Estonia, Germany, Lithuania and Poland (Martinez
in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: