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).
Recorded as a miner in the petioles of Urtica sp. by Ferrar
(1987), Beiger (1968)
and White (1988), although
there are unconfirmed records on Caprifoliaceae and Asteraceae, which seems an odd combination of hosts.
Hosts in Great Britain & Ireland:
of year - mines: ? July.
of year - adults: Currently unknown.
in Great Britain & Ireland: England, as far north as Yorkshire
(White, 1988: 38), including
the Channel Is. (Merz and Korneyev in Fauna Europaea); Anglesey (VC52), Berkshire (VC22), Breconshire (VC42), Buckinghamshire (VC24),
Caernarvonshire (VC49), Cambridgeshire (VC29), Derbyshire (VC57), Dorset (VC9), East Kent (VC15),
East Norfolk (VC27), East Suffolk (VC25), East Sussex (VC14), Glamorganshire (VC41), Herefordshire (VC36),
Huntingdonshire (VC31), Mid-west Yorkshire (VC64), Monmouthshire (VC35), North Lincolnshire (VC54),
North Somerset (VC6), Northamptonshire (VC32), Oxfordshire (VC23), Renfrewshire (VC76), Shropshire (VC40),
South Hampshire (VC11), South Lancashire (VC59), South Wiltshire (VC8), South-east Yorkshire (VC61),
Staffordshire (VC39), Surrey (VC17), West Kent (VC16), West Lancashire (VC60), West Norfolk (VC28), West Suffolk (VC26), Westmorland (VC69) and Worcestershire (VC37) (NBN
recorded in the Republic of Ireland (Merz and Korneyev, in Fauna Europaea).
NBN Grid Map:
elsewhere: Throughout Europe, except the north (White,
1988: 38) including Andorra, Austria, Belgium, Czech Republic,
Denmark, Finald, French mainland, Germany, Italian mainland, Lithuania,
Norwegian mainland, Poland, Russia - Central and East, Slovakia,
Spanish mainland, Spanish mainland, Sweden Switzerland, The Netherlands
and Ukraine (Merz and Korneyev, in Fauna Europaea).
recorded in the Near East (Merz and Korneyev, in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
host species records unknown
British and Irish Parasitoids in Britain and elsewhere: