a brownish blotch, at apex of leaf segment, several larvae feed
together. Pupation in mine (Spencer, 1972b: 94).
later brownish, upper-surface blotch in the tip of a leaf segment,
without a trace of an initial corridor. Often several larvae share
a mine. No secondary feeding lines. Frass in numerous blackish green
granules that are irregularly scattered. Pupation within the mine,
pupariria loose in the mine (Bladmineerders van Europa).
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 puparium is described by (Hering, 1957a) (Bladmineerders van Europa).
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 (Spencer, 1972b: 94).
Reddish brown; described by de Meijere (1926a) (Bladmineerders van Europa).
Hosts in Great Britain & Ireland:
of year - mines: August.
of year - adults: Currently unknown.
in Great Britain & Ireland: Uncommon. Derby (Miller's Dale)
(Spencer, 1972b: 94) and
Warwickshire (Combrook) (Robbins,
NBN Grid Map:
elsewhere: Widespread in continental Europe including Germany
(Hendel, 1920: 167). Germany and SPanish mainland (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: