Leaf-miner: Narrow
corridor, leading to a large blotch. The blotch has lower- and upper-surface
parts, and is full depth where these overlap. Pupation external
(Robbins, 1991a).
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.
Watch a video of a scaptomyzid fly larva on Arabidopsis on YouTube by mash92587.
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).
Comments:
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 and Ireland:
Hosts elsewhere:
Time
of year - mines: July.
Time
of year - adults: Appears to have at least two generations a
year. Most abundant in May and October.
Distribution
in Great Britain and Ireland: Widespread from Caithness in
the north to Kent in the south-east. Inner Hebrides (Isle of Coll)
(Bland, 1992); Anglesey, Breconshire, Cambridgeshire,
Cardiganshire, Glamorgan, Monmouthshire, North Somerset Pembrokeshire,
South Aberdeenshire, South-west Yorkshire, Surrey and Westmorland (NBN
Atlas). Distribution
elsewhere: Widespread in continental Europe (Bächli
and Roche Pite, 1984) including Austria, Bosnia and
Herzegovina, Croatia, Czech Republic, Denmark, Finland, French mainland,
Germany, Hungary, Lithuania, Norwegian mainland, Poland, Romania,
Russia - North and Northwest, Slovakia, Sweden and The Netherlands
(Bächli, 2004 in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.
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