Stem-borer:
Larva boring in stem, pupation in early spring in the ground (Spencer, 1972b: 44).
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:
99).
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: Currently unknown.
Time
of year - larvae: Early spring.
Time
of year - adults: Currently unknown.
Distribution
in Great Britain and Ireland: Kent (East Malling) (Spencer, 1972b: 44). Distribution elsewhere: Widespread in continental Europe including Germany (Spencer,
1990: 104; Dempewolf, 2001:
99), Corsica and French mainland (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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Trachionus
hians (Nees, 1816) |
Braconidae: Alysiinae |
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