Mine in the lowest part of the petiole, not in the pinnulae-bearing
part of the rachis. Often several larvae together. Mined leaves
are stunted, often incompletely rolled out. Puparium in the mine
or in the ground (Bladmineerders van Europa). See de Meijere (1911a) and Brown and McGavin
(1982) for details of
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.
Larva with undivided posterior processes of the cephalopharyngeal
skeleton (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).
Included in Redfern et al. (2002:
397, fig 645) in keys to galls. Ackland in Chandler
(1978) did not indicate whether his host record was British or Foreign
and is therefore included under 'Hosts in Britain' and 'Hosts elsewhere'.
Hosts in Great Britain & Ireland:
of year - mines:
June-July (Bladmineerders van Europa).
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including
Buckinghamshire (VC24), East Kent (VC15), Glamorganshire (VC41), North Hampshire (VC12), North Lincolnshire (VC54),
North Somerset (VC6), North Wiltshire (VC7), Oxfordshire (VC23), Pembrokeshire (VC45), Shropshire (VC40),
South Devon (VC3), South Wiltshire (VC8), South-west Yorkshire (VC63), Staffordshire (VC39), Surrey (VC17), West Suffolk (VC26) and Worcestershire (VC37) (NBN
Distribution elsewhere: Widespread in continental Europe including The Netherlands (Bladmineerders van Europa), Corsica, ? Czech Republic, Denmark, Finland, French
mainland, Germany, Greek mainland, Italian mainland, Poland, Russia
- Northwest, Sicily, Sweden and Yugoslavia (Michelsen in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: