Agromyza
albitarsis Zetterstedt, 1848. Diptera Scandinaviae. 7:
2735. [Preoccupied by Agromyza albitarsis Meigen, 1830]
Agromyza alnivora Spencer, 1969c. Beitr. Ent. 19:
7
Agromyza alnivora Spencer, 1969c; Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 37 (figs 116-8), 39, 42, 109
Agromyza alnivora Spencer, 1969c; Spencer, 1976. Fauna
ent. Scand. 5(1): 93-5, figs 131-133
Agromyza alnivora Spencer, 1969c; Spencer, 1990. Host
specialization in the world Agromyzidae (Diptera) : 54, 60 (fig.
226), 61, 100, 178.
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Leaf-miner: Larva
forming a linear leaf-mine, considerably widening at end (Spencer,
1976: 94-95, fig. 133).
An
upper-surface corridor, initially very shallow, gradually widening
(often quite broad in the end), not associated with leaf margin
or veins; mature mine often with a characteristic brown colouration.
Frass in two rows. The gold-coloured larva leaves the mine before
pupation, through a semicircular exit slit in the upper epidermis
(Bladmineerders van Europa).
An upper surface gallery, narrow at first but, widening considerably towards the end (British
leafminers). |
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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 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).
Hosts in Great Britain and Ireland:
Hosts
elsewhere:
Time
of year - mines: July, August-September.
Time
of year - adults: September and June-July the following year.
Distribution
in Great Britain and Ireland: Widespread in Britain including
Kent (St Mary's Cray), Oxford (Hogley), Cambridge (Chippenham Fen)
(Spencer, 1972b: 39), Warwickshire
(Coventry) (Robbins, 1991:
78), Inverness (Nethy Bridge) (Spencer, 1972b: 39), the Inner Hebrides (Isle of Coll, Arinagour) (Bland,
1992), Hampshire (Fleet) (British
leafminers) and Anglesey, Caernarvonshire, Cardiganshire, Carmarthenshire, Derbyshire, East Ross, Easterness, Glamorgan, Main Argyll, Merionethshire, Mid-west Yorkshire, North Ebudes, Shropshire, South Lancashire, South-west Yorkshire, Surrey, West Gloucestershire, West Lancashire and Westerness (NBN
Atlas). Distribution
elsewhere: Widespread in continental Europe including Austria,
Denmark, Finland, Germany, Holland, Norway, Romania, Sweden (Spencer,
1976: 95), Czech Republic, French mainland, Lithuania, Poland
and Slovakia (Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
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