The leaf and stem mines of British flies and other insects

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds


Agromyza intermittens (Becker, 1907)
[Diptera: Agromyzidae]

Domomyza intermittens Becker, 1907. Z. syst. Hymenopt. Dipterol. 7: 406
Phytomyza secalina Hering, 1925b. Zeitschrift für Morphologie und Ökologie der Tiere. [A] 4: 520
Domomyza intermittens Becker, 1907; Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 126
Agromyza intermittens (Becker, 1907); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 30, 31, 33, 124
Agromyza intermittens (Becker, 1907); Spencer, 1976. Fauna ent. Scand. 5(1): 115-6, fig. 187
Agromyza intermittens (Becker, 1907); Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 355, 356, 360 (fig. 1350), 361.

Leaf-miner: Broad corridor, starting not far from the base of the blade, running upwards. Frass deliquescent, only few grains recognisable, mine greenish. Larva solitary. Pupation outside the mine (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 is described by Darvas and Papp (1985) and Darvas, Skuhravá and Andersen (2000). Mandibles each with 2 heavy teeth, front spiraculum with 11-14, rear spiraculum with 3 bulbs. The bulbs of the rear spiracula are elongated and S-shaped (d'Aguilar, Chambon and Touber, 1976a; Hering, 1957a, 1962a; Spencer, 1973b) (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).

Entirely reddish-brown; posterior spiracles each with 3 bulbs (Spencer, 1976: 115).

Uniformly reddish brown, rear spiracula on low protuberances, separated by their own diameter (d'Aguilar, Chambon and Touber, 1976a; Hering, 1957a, 1962a; Spencer, 1973b) (Bladmineerders van Europa).

Hosts in Great Britain and Ireland:

Secale cereale Rye   Spencer, 1972b: 124

Hosts elsewhere:

Bromus       Spencer, 1990: 355
Bromus hordeaceus Soft-brome British Wild Flowers by John Somerville et al. Spencer, 1976: 115
Bromus hordeaceus Soft-brome British Wild Flowers by John Somerville et al.

Bladmineerders van Europa, as Bromus mollis

Hordeum       Spencer, 1990: 356
Hordeum vulgare Six-rowed Barley   Spencer, 1976: 115
Hordeum vulgare Six-rowed Barley   Bladmineerders van Europa
Secale       Spencer, 1990: 356
Secale cereale Rye   Spencer, 1976: 115
Secale cereale Rye   Bladmineerders van Europa
Triticum aestivum Bread Wheat   Bladmineerders van Europa

Time of year - mines: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: England including Oxford (Oxford), Cambridge (Chippenham Fen) and Huntingdonshire (Woodwalton Fen) (Spencer, 1972b: 33) and Cambridgeshire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Denmark (Spencer, 1976: 115), The Netherlands (Bladmineerders van Europa), Germany (Spencer, 1976: 546), Belarus, Canary Is., Czech Republic, Estonia, European Turkey, French mainland, Germany, Hungary, Lithuania, Poland, Slovakia, Spanish mainland and Yugoslavia (Fauna Europaea).

Also recorded in Tunisia (Spencer, 1976: 115).

NBN Atlas links to known host species:

Bromus hordeaceus, Hordeum vulgare, Secale cereale, Triticum aestivum

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.

External links: Search the internet:
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Atlas
NHM UK Checklist
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