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 anterior spiracles of the larva are 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).
Yellow; anterior spiracle openings arranged in large arcs, not elevated
on a fan-like structure; posterior spiracles each with a central
opening larger and more raised than the lateral openings.
The adult is illustrated in the Encyclopedia
Hosts in Great Britain & Ireland:
of year - mines: October-November.
of year - adults: May-June.
in Great Britain & Ireland: Throughout the British Isles
(White, 1988) including Warwickshire
(Sutton Park and Corley) (Robbins,
1991: 110), West Yorkshire (Cromwell Bottom LNR) and Cumbria
(Roudsea Wood and Mosses NNR) (British
leafminers), Ayrshire (VC74), Berkshire (VC22), Buckinghamshire (VC24), Cambridgeshire (VC29),
Dorset (VC9), East Kent (VC15), East Gloucestershire (VC33), East Kent (VC15), East Ross (VC106), East Sussex (VC14), Easterness (VC96), Glamorganshire (VC41), Herefordshire (VC36), Huntingdonshire (VC31), Isle of Wight (VC10), North Hampshire (VC12), North Somerset (VC6), North Wiltshire (VC7), South Aberdeenshire (VC92), South Wiltshire (VC8), South Lancashire (VC59), South Wiltshire (VC8), South-west Yorkshire (VC63), Staffordshire (VC39), Surrey (VC17), Warwickshire (VC38), West Sussex (VC13), Westmorland (VC69) and Worcestershire (VC37) (NBN
recorded in the Republic of Ireland (Merz and Korneyev in Fauna Europaea).
NBN Grid Map:
elsewhere: Widespread in continental Europe including The Netherlands
(de Meijere, 1939), Belgium
(Leclercq and de Bruyn,
1991), Luxembourg (Bladmineerders van Europa), Albania, Austria, Bulgaria, Czech Republic, Denmark,
Finland, French mainland, Germany, Hungary, Italian mainland, Lithuania,
Norwegian mainland, Poland, Romania, Russia - Central, Slovakia,
Sweden, Switzerland and Ukraine (Merz and Korneyev in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: