Larva feeding internally in the stems. Pupation internal. (Spencer,
1976: 284). The larva bores in the pith of the thicker parts
of the leaves, leaf sheets and flower stalk. The puparium is formed
within 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.
Dark brown; each spiracular process on a separate projection and
each with a regular ellipse of 12 well-defined bulbs (Spencer,
1976: 284). The larva is also 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).
Hosts in Great Britain & Ireland: Currently unknown.
of year - larvae: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: England including Buckinghamshire (VC24),
Cambridgeshire (VC29), East Sussex and Surrey (NBN
Atlas, as Metopomyza ornata).
elsewhere: Widespread in continental Europe including Denmark,
Sweden (Spencer, 1976: 284),
Germany (Spencer, 1976: 562),
Belgium, Finland, Hungary, Lithuania, Poland, Slovakia and The Netherlands
(Martinez in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.