Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Impatiens

1 > Leaf miner: A narrow linear mine in the first instar, later producing a large irregular whitish blotch with conspicuous black frass. Pupation external (Spencer, 1972b: 47 (fig. 144), 50; Spencer, 1976: 297 (fig. 536), 298).

Long untidy corridor that irregularly widens and narrows. Frass in lumps, strings or thread fragments. Pupation outside the mine.

The larva forms a narrow linear mine in the first instar, later producing a large irregular whitish blotch with conspicuous black frass.

The mine is also illustrated in the Encyclopedia of Life.

Oligophagous. On Impatiens glandulifera, Impatiens noli-tangere and Impatiens parviflora in Britain and elsewhere. Widespread in Britain and elsewhere. Described from the U.S.A. and also recorded in Canada.

Phytoliriomyza melampyga (Loew, 1869) [Diptera: Agromyzidae].