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(Coleoptera, Diptera, Hymenoptera and Lepidoptera)
by
Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds
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Liriomyza
pusilla (Meigen, 1830) [Diptera:
Agromyzidae]
Agromyza
pusilla Meigen, 1830. Syst. Beschr. 6: 185
Agromyza fasciola Meigen, 1838. Syst. Beschr. 7:
204
Liriomyza pusilla (Meigen, 1830); Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 48, 49 (fig. 157), 54, 111-2,
114
Liriomyza
pusilla (Meigen, 1830); Spencer, 1976. Fauna ent. Scand.
5(1): 266, figs 473-4.
Liriomyza
pusilla (Meigen, 1830); Spencer, 1990. Host specialization
in the World Agromyzidae (Diptera) : 263, 270-1, 273-5, 277,
278 (figs 1051-4), 285, 295, 315-6, 319-20, 386, 398.
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Leaf-miner: An irregular linear mine, which in small leaves can form a secondary
blotch.
Long,
upper-surface corridor, winding through the leaf and frequently
crossing itself; in small leaves often a secondary blotch in the
end. Frass in short strings and pearl chains. Pupation outside the
mine (Bladmineerders van Europa).
An irregular gallery, sometimes crossing over, with black frass arranged as elongate very narrow streaks at the sides of the mine (British
leafminers).
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 Dempewolf (2001:
150) 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).
Orange; posterior spiracles each with 3 bulbs.
Hosts in Great Britain and Ireland:
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