Larvae feeding in seed-capsules and pupating in the seed heads (Spencer,
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:
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).
Brown, deeply segmented; posterior spiracles strongly chitinised,
each with an ellipse of some 25 bulbs; all segments have a band
of short spinules which are particularly strong in the anal region
(Spencer, 1976: 438).
Hosts in Great Britain & Ireland:
of year - larvae: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: Oxford (Oxford) and Monmouthshire
(St. Pierre) (Spencer, 1972b:
82); Monmouthshire (NBN
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe including Denmark, Finland, Sweden (Spencer,
1976: 438), Germany (Dempewolf,
2001: 191), Czech Republic, Norwegian mainland, Poland and The
Netherlands (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: