in the stems (Spencer, 1990:
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).
Hosts in Great Britain & Ireland: Currently unknown.
of year - larvae: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: Kent (Tunbridge Wells and Cudham),
Surrey (Godstone), Suffolk (Barton Mills) and North Hampshire (Polton)
(Spencer, 1972b: 67); Cambridgeshire
and West Suffolk (VC26) (NBN
elsewhere: Widespread in continental Europe including Netherlands,
Denmark, Germany (Spencer, 1976:
340), Czech Republic, Estonia, French mainland, Poland and Slovakia
(Martinez in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.