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


Metopomyza flavonotata (Haliday, 1833)
[Diptera: Agromyzidae]

Agromyza flavonotata Haliday, 1833. Ent. Mag. 1: 173
Agromyza flavonotata Haliday, 1833; Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 221.
Agromyza flavoscutellaris Zetterstedt, 1838; Spencer, 1972b. Handbk ident. Br. Ins. X 5(g): 59 (fig. 197), 60, 122. [Misidentification]
Metopomyza flavonotata (Haliday, 1833); Spencer, 1976. Fauna ent. Scand. 5(1): 280-1, fig. 503.

Leaf-miner: Upper surface, deep, narrow mine; frass in two regular rows; pupation external (Spencer, 1972b: 60, as flavoscutellaris).

A short, descending corridor in a leaf sheath. Fress in few, isolated blad granules. 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 de Meijere (1941) 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).

Brownish yellow (Bladmineerders van Europa).

Hosts in Great Britain and Ireland:

Carex       Spencer, 1972b: 122, as flavoscutellaris

Hosts elsewhere:

Alopecurus pratensis Meadow Foxtail British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Deschampsia cespitosa Hair-grass British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Holcus mollis Creeping Soft-grass   Bladmineerders van Europa

Time of year - larvae: June-July (Bladmineerders van Europa).

Time of year - adults: Not uncommon in meadows in early summer (Spencer, 1972b: 60).

Distribution in Great Britain and Ireland: Widespread in south. Dorset (Studland), Suffolk (Aldeburgh), Derbyshire (Miller's Dale), Elgin (Culbin Sands), Dunbartonshire (Bonhill) (Spencer, 1972b: 60, as flavoscutellaris); Cambridgeshire, Dumfriesshire, East Suffolk, Easterness, Glamorgan, Huntingdonshire, Mid-west Yorkshire, North-east Yorkshire, South-west Yorkshire and Stafford (NBN Atlas).

Also recorded in the Republic of Ireland: Co. Wicklow (Spencer, 1972b: 60, as flavoscutellaris).

Distribution elsewhere: Widespread in continental Europe including Denmark, Finland, Sweden (Spencer, 1976: 281), The Netherlands (Bladmineerders van Europa), Belgium (Scheirs, de Bruyn and von Tschirnhaus, 1995), Germany (Spencer, 1976: 562), Austria, Belarus, Canary Is., Czech Republic, Estonia, French mainland, Hungary, Italian mainland, Latvia, Lithuania, Poland, Romania and Spanish mainland (Fauna Europaea).

NBN Atlas links to known host species:

Alopecurus pratensis, Deschampsia cespitosa, Holcus mollis

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea - Links to species no longer available  
Chorebus varuna (Nixon, 1945) Braconidae: Alysiinae

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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