griffithsi Spencer, 1963
Spencer, 1963d. Stuttg. Beitr. Naturk. No. 103:
1-2, figs 1a-1d
Phytomyza griffithsi Spencer, 1963d; Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 84, 85 (fig. 275A, 118
Phytomyza griffithsi Spencer, 1963d; Spencer, 1990. Host
specialization in the World Agromyzidae (Diptera) : 212.
initially lower surface, but largely on upper surface, irregularly
linear, finally almost filling the petiole and ending at the base.
Pupation within the petiole (Spencer, 1972b: 84, 85 (fig. 275A)).
eggs are deposited on the blade. From there narrow corridors descend
in the direction of the petiole. Once they have arrived there, the
larvae start making broad lobate corridors that fan out over the
basal half of the leaf. Later parts of the mine are party upper-surface,
partly interparenchymatous, looking pale green. In the shallow parts
primary feeding lines often visible. Frass in widely dispersed grains.
According to Buhr (1964a) older mines often turn black. Pupation
within the mine, often in the petiole. Puparium generally at the
lower surface; the anterior spiracles penetrate the epidermis (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.
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).
Posterior spiracular process only slightly raised (Spencer, 1972b: 84). White (Bladmineerders van Europa).
Hosts in Great Britain & Ireland:
of year - mines: June.
of year - adults: July.
in Great Britain & Ireland: Uncommon. Surrey (Box Hill)
(Spencer, 1963d: 1-2).
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Distribution elsewhere: Widespread in continental Europe including Germany (Spencer,
1963d: 1-2; Spencer, 1990:
212), The Netherlands (Bladmineerders van Europa), Czech Republic, Lithuania and Poland (Martinez
in Fauna Europaea).
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British and Irish Parasitoids in Britain and elsewhere: