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).
Shining brown, deeply segmented; posterior spiracles separated,
on short stalks, each with 3 bulbs, arising from a stout conical
protuberance (Spencer, 1976).
Hosts in Great Britain & Ireland:
elsewhere: Currently unknown.
of year - mines: Currently unknown.
of year - adults: June.
in Great Britain & Ireland: Argyll (Dunoon) (Spencer, 1972b: 102, as cingulata), Warwickshire (Allesley) (Robbins,
1991: 136) and Cambridgeshire (NBN
elsewhere: Widespread in continental Europe including Denmark,
Sweden, Norway, Finland, N. Germany and Russia (Leningrad area)
(Spencer, 1976: 186), Danish
Germany, Norwegian mainland, Sweden and Nearctic region (Martinez
in Fauna Europaea)
recorded in Canada (Spencer,
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: