Larva boring in stem. Pupation internal (Spencer, 1972b: 17).
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 spiracles separated by own diameter, each with 14-18 well
defined bulbs around the central small horn (Spencer, 1972b: 15).
Hosts in Great Britain & Ireland:
elsewhere: Currently unknown.
of year - larvae: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: Kent (Faversham), Essex (Flatford
and Mersea), Glamorgan (Llanridian salt marsh) (Spencer, 1972b: 36); East Kent and East Sussex (NBN
elsewhere: Widespread in continental Europe including Czech
Republic, Denmark, French mainland, Germany, Spanish mainland and
The Netherlands (Martinez in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: