Simple white linear mine; frass deposited in scattered black spots.
Pupation external (Spencer, 1976:
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 larvae lie on their sides within the mine and use their pick-like mouthparts to feed on plant tissue.
Mandible with 2 teeth; rear spiraculum with 14-17 papillae (de Meijere, 1937a) (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).
Black; posterior spiracles each on a stout conical protuberance
with an ellipse of some 15 minute bulbs (Spencer,
Brownish black (de Meijere, 1934a) (Bladmineerders van Europa).
Hosts in Great Britain & Ireland:
of year - larvae: Currently unknown.
of year - adults: Mid-September.
in Great Britain & Ireland: Recorded in Britain from a single
male caught in a yellow water trap at Malham Tarn, North Yorkshire (Bland,
Godfray and Henshaw, 1999: 50). Added to the British checklist
by Henshaw in Chandler, 1998.
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe including Austria, Denmark,
Finland, Norway, Sweden, Switzerland (Spencer,
1976: 520), Germany (Spencer,
1976: 578), Estonia, French mainland, Lithuania and Switzerland
(Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: