Lifestyle: Currently unknown.
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).
Spencer (1990) deduced from
the distinctive genitalia that infuscata is a grass-feeder.
Hosts in Great Britain & Ireland: Currently unknown.
elsewhere: Currently unknown.
of year - larvae: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: Rare. Records include Cambridge
(Chippenham Fen) (Spencer, 1972b:
50, as portentosa), Dunbarton (Bonhill) (Bland,
1994c: 82) and Huntingdonshire (NBN
Distribution elsewhere: Widespread in continental Europe including Denmark, Sweden, Finland,
Germany (Spencer, 1976: 254),
Belgium, Czech Republic, French mainland, Latvia, Lithuania, Poland,
Slovakia and Spanish mainland (Martinez in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.