Ovipisition on the upper part of the rachis of an unrolling leaf.
The larva bores into the rachis, causing the distal part of the
leaf to become stunted and finally necrotic. Often several larvae
in a mine. Pupation outside the mine (Brown and McGavin, 1982a).
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 - mines: Larvae from spring to end June; hibernation
as puparium in the ground (Brown and McGavin, 1982a).
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including
Huntingdonshire (VC31), Hampshire, Oxfordshire (VC23), Somerset, Norfolk, Glamorganshire (VC41),
Suffolk, Ross and Cromarty, Elgin (Mike Ackland, pers. comm.);
Berkshire (VC22), Buckinghamshire (VC24), Elgin, Glamorganshire (VC41), Hertfordshire (VC20), Huntingdonshire (VC31),
Isle of Wight (VC10), Middlesex (VC21), North Lincolnshire (VC54), North Somerset (VC6), North Wiltshire (VC7), Oxfordshire (VC23), South Hampshire (VC11), and South-west Yorkshire
and West Ross (NBN
NBN Grid Map:
elsewhere: Finland, Germany, Italian mainland, Russia - North
and Sweden (Michelsen in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.