Leaf-mine: Mine usually starts near tip of leaf as a small dark brown blotch; it expands rapidly due to the presence of several larvae in the same mine. This expansion is on a broad front but usually down only one side of the midrib. The final mine is a large brownish subtriangular blotch, which is darkest oin the vicinity of the origin.Under a hand lens, the mine is clearly marked with manyy small patches of parallel feeding-lines. The larvae leave the mine to pupate, but occasionally the puparia are attached to the leaf near to the exit slit (Bland, 1997b: 181-4).

Larva: Details unknown.

Puparium: Red-brown, elongate-ovoid, with the posterior spiracles each having 16-18 well-defined bulbs in an incomplete ellipse (Bland, 1997b: 181-4).

Hosts in Britain:

Hosts elsewhere: Unknown.

Time of year - larvae: Late June to early August.

Time of year - adults: April-May the following year.

Distribution in Great Britain and Ireland: Southern highlands of Scotland (Bland, 1997b: 181-4).

NBN Grid map:

Distribution elsewhere: Unknown.

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: Unknown.