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).
Host unknown, possibly Aster
tripolium (Spencer, 1972b:
Hosts in Great Britain & Ireland: Currently unknown.
elsewhere: Currently unknown.
of year - larvae: Currently unknown.
of year - adults: June-September.
in Great Britain & Ireland: Local. Kent (Deal), Essex (Manningtree
and Walton-on-the-Naze), Suffolk (Barton Mills) and Norfolk (Northrepps)
(Spencer, 1972b: 61).
Distribution elsewhere: Widespread in continental Europe including Sweden (Spencer,
1976: 301), Germany (Spencer,
1976: 562), Austria, Belgium, Bulgaria, Canary Is., Czech Republic,
Estonia, Finland, French mainland, Greek mainland, Hungary, Lithuania,
Poland, Spanish mainland and Ukraine (Martinez in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.