linear, greenish. Larva makes an exit slit through the upper surface
and the puparium remains glued to leaf beyond the end of the mine
(Spencer, 1972b: 76 (fig.
shallow upper-surface corridor, often following the leaf margin.
Frass in two rows, often forming pearl chains. Pupation outside
the mine; exit slit in upper epidermis. The puparium is often found
stuck to the leaf (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.
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).
Shining brownish black (Bladmineerders van Europa).
Hosts in Great Britain & Ireland:
of year - mines: June.
of year - adults: Currently unknown.
in Great Britain & Ireland: Local. Huntingdonshire (Woodwalton
Fen), Suffolk (Clare) (Spencer, 1972b: 80) and Warwickshire (Coombe and Dosthill) (Robbins,
1991: 64); Cambridgeshire (NBN
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe including Germany (Bladmineerders van Europa) and Romania (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: