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Agromyza nigripes Meigen, 1830. Syst. Beschr. 6: 170
Agromyza nigripes Meigen, 1830; Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 137
Agromyza viridominalis Spencer, 1957b. Ent. Gaz. 8: 93
Agromyza nigripes Meigen, 1830; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 31, 34 (fig. 97), 38, 123, 124
Agromyza nigripes Meigen, 1830; Spencer, 1976. Fauna ent. Scand. 5(1): 128-9, figs 113, 115, 222-3.
Agromyza nigripes Meigen, 1830; Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 354, 355, 359.

Leaf-miner: Larvae feeding singly, forming a long, widening mine on the upper surface of the leaf, which is generally limited to one side of the leaf. Pupation external, puparium glued to the leaf near the end of the mine (Spencer, 1976: 128).

Broad corridor, generally beginning near the leaf margin or close to the leaf tip. Most of the times the mine remains at one side of the midrib. The mine is upper-surface, but has some full depth, translucent spots here and there. Frass in rather regularly scattered grains. Pupation outside the mine. According to Dempewolf (2004a) only the male genitalia enable a reliable discrimination from A. abipennis and A. graminicola (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.

The larva was decribed by Griffiths (1963) and illustrated in Bladmineerders van Europa.

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).

Varying from black to reddish; posterior spiracular processes distinctly separated, each with 3 bulbs (Spencer, 1972b: 34 (fig. 97); Spencer, 1976: 128).

Hosts in Great Britain and Ireland:

Poaceae
Glyceria				Robbins, 1991: 136
Glyceria	fluitans	Floating Sweet-grass		Spencer, 1972b: 123
Glyceria	maxima	Reed Sweet-grass		Mines in BMNH
Glyceria	maxima	Reed Sweet-grass		Spencer, 1972b: 123
Holcus				Robbins, 1991: 136
Holcus				Spencer, 1972b: 38
Holcus	lanatus	Yorkshire-fog		Spencer, 1972b: 123
Holcus	mollis	Creeping Soft-grass		Spencer, 1972b: 124

Hosts elsewhere:

Poaceae
Agrostis				Spencer, 1990: 354
Agrostis	canina	Velvet Bent		Bladmineerders van Europa
Alopecurus				Bladmineerders van Europa
Brachypodium	sylvaticum	False Brome		Bladmineerders van Europa
Deschampsia				Spencer, 1990: 354
Deschampsia	cespitosa	Tufted Hair-grass		Bladmineerders van Europa
Elytrigia				Bladmineerders van Europa, as Agropyron
Glyceria				Spencer, 1990: 355
Glyceria	fluitans	Floating Sweet-grass		Bladmineerders van Europa
Glyceria	maxima	Reed Sweet-grass		Spencer, 1976: 128
Glyceria	maxima	Reed Sweet-grass		Bladmineerders van Europa
Holcus				Spencer, 1976: 128
Holcus	lanatus	Yorkshire-fog		Spencer, 1990: 354
Holcus	lanatus	Yorkshire-fog		Bladmineerders van Europa
Holcus	mollis	Creeping Soft-grass		Bladmineerders van Europa
Hordeum				Bladmineerders van Europa
Phalaris				Bladmineerders van Europa
Setaria				Bladmineerders van Europa

Time of year - mines: August.

Time of year - adults: There are two generations, in early summer and autumn.

Distribution in Great Britain and Ireland: Widespread and common in Britain including London (Hampstead), Surrey (Ash Vale and Bookham), Buckinghamshire (Beaconsfield) (Spencer, 1972b: 38), Warwickshire (Longford) (Robbins, 1991: 136), Cambridgeshire, Denbighshire, East Cornwall, Huntingdonshire, North Hampshire, North Somerset, Northamptonshire, Pembrokeshire, South-west Yorkshire, Stafford, Surrey, West Cornwall, West Gloucestershire and Westmorland (NBN Atlas).

Also recorded in the Republic of Ireland, Co. Clare (Spencer, 1972b: 38).

Distribution elsewhere: Widespread in continental Europe including Denmark, Finland, Norway, Sweden (Spencer, 1976: 128), The Netherlands (Bladmineerders van Europa), Belgium (de Bruyn and von Tschirnhaus, 1991) and Germany (Spencer, 1976: 546), Corsica, Czech Republic, Estonia, French mainland, Hungary, ? Italian mainland, Latvia, Lithuania, Poland, Slovakia and Spanish mainland (Fauna Europaea).

Also recorded in Canada (Spencer, 1969a: 50; Spencer, 1990).

NBN Atlas links to known host species:

British and Irish Parasitoids in Britain and elsewhere: