Leaf-mine: Leaf-mine normally short and broad (Spencer, 1976: 97). According to Hering (1957) initially the larva does not feed towards the apex of the leaf. Pupation external (Spencer, 1976: 97).

The shallow, whtish mine starts (not very close to the base of the lamina) as a fine ascending corridor. This is overrun when the direction alternates, and the mine quickly widens. The final mine is characteristically short; often not the full width of the leaf is used. Frass in big black grains, never greenish. Pupation outside the mine (Bladmineerders van Europa).

Larva: Larval mandibles with three teeth; posterior spiracles each with 3 bulbs (Hering, 1953).

The mandible with two normal teeth, and a smaller additional basal one (Hering, 1953a). The girdles of fine spinulation along the anterior and posterior margins of the body segments normal, i.e., relatively narrow, nowhere fusing together (unlike in A. nigrociliata). Rear spiracula far apart, each with 3 bulbs. Behind the mandibles ventrally a median field with fine spines (character of the Agromyza ambigua group of Griffiths, 1963a).The larva is also illustrated by Beri (1971c), based on material from India, living on a Setaria species. However, he describes the left mandible as having 2, the right one 1 tooth, which makes it questionable if he had the European species in front of him (Bladmineerders van Europa)

Puparium: Yellowish-brown; posterior spiracles each with 3 bulbs, processes widely separated (Spencer, 1976: 97).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: July.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread, but local -. Kent (Thames Marshes) (Spencer, 1972: 33), Aberdour and Bonhill (Spencer, 1956) and Outer Hebrides (North Uist) (Bland, 1994b).

NBN Grid map:

Distribution elsewhere: Common and Widespread in continental Europe (Spencer, 1990) including The Netherlands (Bladmineerders van Europa), Denmark, Sweden, Finland (Spencer, 1976: 97), Germany (Spencer, 1976: 546) Canary Is., Czech Republic, Hungary, Italian mainland, Sicily, Slovakia, Spanish mainland, Switzerland and Yugoslavia (Martinez in Fauna Europaea).

Also recorded in Canada and America (Spencer, 1969a: 35; Spencer, 1990).

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

Parasitoids in Britain and elsewhere: Unknown.