Leaf miner: Lower- or upper-surface corridor, possibly doubling one or two times, descends, sometimes as low as the leaf sheath. The gallery does not ocupy the entire width of the blade, runs along the midrib. Larva solitary. Frass as one big lump in the mine. Pupation internal (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).
Brown, 2.5 - 3 mm; posterior spiracual 2 - 3 times as high as the distance between their bases (Nowakowski, 1973a) (Bladmineerders van Europa).
Hosts in Great Britain & Ireland:
of year - mines: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: Uncommon. Kent (Stone Marshes)
(Spencer, 1972b: 124); Cambridgeshire
Distribution elsewhere: Widespread in continental Europe, but uncommon (Spencer,
1990: 371) including Belgium, Czech Republic, French mainland,
Germany, Hungary, Italian mainland, Poland and Spanish mainland
(Martinez in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.