Leaf-miner: A
relatively short and broad upper linear-blotch surface mine (Spencer, 1972b: 76 (fig. 255), 80; Spencer,
1976: 468, 469 (Fig. 825)).
Elongated
upper-surface blotch with conspicuous primary feeding lines. Frass
partly in pear strings. Pupation outside the mine (Spencer, 1954a)
- see 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 (1937);
anterior spiracles each with 3 bulbs (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).
Black; posterior spiracles each with an ellipse of 12-19 bulbs Spencer,
1976: 468).
Hosts in Great Britain and Ireland:
Hosts elsewhere:
Time
of year - mines: June.
Time
of year - adults: Currently unknown.
Distribution
in Great Britain and Ireland: Probably widespread, at least
in south. Middlesex (Mill Hill) (Spencer, 1972b: 80) and Warwickshire (Sutton Park and Sowe Hill) (Robbins,
1991: 65).
Distribution
elsewhere: Widespread in continental Europe including Germany
(Spencer, 1976: 574), Sweden
(Spencer, 1976: 468), The
Netherlands (Bladmineerders van Europa), Belarus, Bosnia and Herzegovina, Czech Republic,
Latvia, Lithuania and Poland (Fauna Europaea). NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
Ichneumonoidea - Links to species no longer available |
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Dacnusa
laevipectus Thomson, 1895 |
Braconidae: Alysiinae |
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