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Agromyza populicola Haliday, 1853, in Walker. Insecta Brit., Dipt. 2: 247
Agromyza populicola Haliday, 1853; Hendel, 1932. Fliegen palaearkt. Reg. 6(2): 289
Phytomyza pulcherrima Rydén, 1947. Opusc. ent. 12: 113
Phytomyza pulcherrima Rydén, 1947; Rydén, 1954. Opusc. ent. 19: 86
Paraphytomyza populicola (Haliday, 1853); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 65
Paraphytomyza populicola (Haliday, 1853); Spencer, 1976. Fauna ent. Scand. 5(1): 322, figs 579-581.
Paraphytomyza populicola (Haliday, 1853); Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 81, 93.
Aulagromyza populicola (Haliday, 1853)

Leaf-miner: A shallow, greenish upper surface blotch-mine, which can be somewhat elongate but never obviously linear. Pupation external (Spencer, 1976: 321 (fig. 581), 322).

Irregular, yellowish green, upper-surface blotch. Pupation outside the mine; exit slit in upper epidermis. The exit slit is unusually long: from half to almost three quarters of a circle. Frass in rather few, coarse grains (Bladmineerders van Europa).

The mine is also illustrated in and British leafminers.

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 is described by de Meijere (1934) 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).

Dark brown; posterior spiracles each having two arms, with a total of some 20 bulbs (Spencer, 1976: 322).

Hosts in Great Britain and Ireland:

Salicaceae
Populus				Mines in BMNH
Populus	x canadensis	Hybrid Black-poplar		Robbins, 1991: 89
Populus	x canadensis	Hybrid Black-poplar		British leafminers
Populus	nigra	Black-poplar		British leafminers
Populus	nigra	Black-poplar		Robbins, 1991: 89
Populus	nigra	Black-poplar		Spencer, 1972b: 119

Hosts elsewhere:

Salicaceae
Populus				Spencer, 1990: 81, 93
Populus	balsamifera	Eastern Balsam-poplar		Bladmineerders van Europa
Populus	x canadensis	Hybrid Black-poplar		Spencer, 1972b
Populus	candicans			Bladmineerders van Europa
Populus	deltoides	Necklace Poplar		Bladmineerders van Europa
Populus	x euramericana			Bladmineerders van Europa
Populus	nigra	Black-poplar		Bladmineerders van Europa
Populus	nigra	Black-poplar		Spencer, 1976: 320
Populus	nigra 'Italica'	Lombardy-poplar		Bladmineerders van Europa
Populus	tremula	Aspen		Bladmineerders van Europa

Time of year - mines: September.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Uncommon in Britain. Records include Buckinghamshire (Black Park) (Spencer, 1972b: 65) and Warwickshire (Foleshill) (Robbins, 1991: 89). Glamorgan, Merionethshire, North Somerset, South-west Yorkshire and Westmorland (NBN Atlas).

Also recorded in the Republic of Ireland (Fauna Europaea).

Distribution elsewhere: Widespread in continental Europe including Denmark, Germany (Spencer, 1976: 320), The Netherlands (Bladmineerders van Europa), Belgium, French mainland, Italian mainland, Lithuania and Poland (Fauna Europaea).

Also recorded in Canada (Spencer, 1976: 320).

NBN Atlas links to known host species:

Parasitioids: