Upper surface, deep, narrow mine; frass in two regular rows; pupation
external (Spencer, 1972b:
60, as flavoscutellaris).
short, descending corridor in a leaf sheath. Fress in few, isolated
blad granules. Pupation 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 (1941) and 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).
Brownish yellow (Bladmineerders van Europa).
Hosts in Great Britain & Ireland:
of year - larvae:
June-July (Bladmineerders van Europa).
of year - adults: Not uncommon in meadows in early summer (Spencer, 1972b: 60).
in Great Britain & Ireland: Widespread in south. Dorset
(Studland), Suffolk (Aldeburgh), Derby (Miller's Dale), Elgin (Culbin
Sands), Dunbarton (Bonhill) (Spencer, 1972b: 60, as flavoscutellaris); Cambridgeshire (VC29), East Suffolk (VC25), Glamorganshire (VC41), Huntingdonshire (VC31), North-east Yorkshire (VC62), Staffordshire (VC39), West Kent (VC16) and West Sussex (VC13) (NBN
recorded in the Republic of Ireland: Co. Wicklow (Spencer, 1972b: 60, as flavoscutellaris).
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elsewhere: Widespread in continental Europe including Denmark,
Finland, Sweden (Spencer, 1976:
281), The Netherlands (Bladmineerders van Europa), Belgium (Scheirs,
de Bruyn and von Tschirnhaus, 1995), Germany (Spencer,
1976: 562), Austria, Belarus, Canary Is., Czech Republic, Estonia,
French mainland, Hungary, Italian mainland, Latvia, Lithuania, Poland,
Romania and Spanish mainland (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: