pale-coloured mine runs on the upper side irregularly to the sides,
in the middle with blackish spots, where the frass is deposited.
It starts in the center of a leaf and without a small mine leading
to a large mine. Many mines in a leaf could finally cover the whole
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).
Ackland in Chandler (1978)
did not indicate whether his host records were British or Foreign
and are therefore included under 'Hosts in Britain' and 'Hosts elsewhere
Hosts in Great Britain & Ireland:
of year - mines: Autumn.
of year - adults: Currently unknown.
in Great Britain & Ireland: Recorded in Britain by Ackland
(1978). Rarely found in the
the UK. Recorded from Somerset, Oxford, Suffolk and Cambridge (British
leafminers); Cambridgeshire (VC29), Dumfriesshire (VC72), Forfar, Middlesex (VC21),
Oxfordshire (VC23), Peebles, West Gloucestershire (VC34), West Kent (VC16) and West Suffolk (VC26) (NBN
NBN Grid Map:
elsewhere: Widespread in continental Europe including Czech
Republic, French mainland, Germany, Poland, Slovakia and Switzerland
(Michelsen in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: