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Leaf-miner: Upper-surface corridor, descending towards the leaf base, generally following the midrib. Frass in a double row of granules. Pupation outside the mine (Robbins, 1991), see also 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).

Hosts in Great Britain and Ireland:

Hosts elsewhere:

Cyperaceae
Carex				Spencer, 1976: 286
Carex				Bladmineerders van Europa
Carex	sylvatica	Wood-sedge		Spencer, 1990: 351

Time of year - mines: Currently unknown.

Time of year - adults: May and July.

Distribution in Great Britain and Ireland: Widespread in Britain including Dorset (Studland), Suffolk (Aldeburgh), Elgin (Culbin Sands) (Spencer, 1972, as flavoscutellaris) and Warwickshire (Ufton Fields) (Robbins, 1991: 134).

Distribution elsewhere: Widespread in continental Europe including Denmark, Finland, Sweden (Spencer, 1976: 286), Germany (Spencer, 1990: 247; Spencer, 1976: 562), Belarus, Czech Republic, Estonia, Hungary, Lithuania, Poland, Slovakia and Yugoslavia (Martinez, 2007 in Fauna Europaea).

NBN Atlas links to known host species:

British and Irish Parasitoids in Britain and elsewhere: