Strongly branched corridor mine which can become a secondary blotch.
Frass in small grains. Pupation inside the mine (Spencer,
1976: 505 (fig. 883) or outside 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);
posterior spiracles each with approx. 17 bulbs.
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 with approx. 17 bulbs.
Hosts in Great Britain & Ireland: Currently unknown.
of year - larvae:
April (Hering, 1957).
of year - adults: Currently unknown.
in Great Britain & Ireland: Recorded as new to Britain by
McLean (1981); Anglesey and
NBN Grid Map:
elsewhere: Widespread in continental Europe including Austria,
Germany, Denmark, Finland, Sweden, Spain (Spencer,
1976: 505), Czech Republic, Estonia, European Turkey, French
mainland, Italian mainland, Latvia and Lithuania (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.