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 rondensis Strobl, 1900
[Diptera: Agromyzidae]

Agromyza rondensis Strobl, 1900a. Wien. ent. Ztg. 19: 62
Domomyza occellaris Hendel, 1920. Archiv für Naturgeschichte [a] 84(7): 124. [Synonymised by Spencer, 1966c: 290]
Agromyza nigrifemur Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 137. [Synonymised by Spencer, 1966c: 290]
Agromyza veris Hering, 1951c. Z. angew. Ent. 32: 604. [Synonymised by Spencer, 1966c: 290]
Agromyza rondensis Strobl, 1900a; Spencer, 1966c. Beitr. Ent. 16: 290
Agromyza rondensis Strobl, 1900a; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 10, 32 (fig. 84), 35, 122, 123, 124, 126
Agromyza rondensis Strobl, 1900a; Spencer, 1976. Fauna ent. Scand. 5(1): 139-141, figs 247-52.
Agromyza rondensis Strobl, 1900a; Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 354, 355, 356, 359, 360 (fig. 1348), 364.

Leaf-miner: Mine greenish with only single larva, initially running towards apex of leaf before turning back down and developing into a broad blotch (Spencer, 1972b: 32, fig. 84; Spencer, 1976: 140, fig. 251).

Deep, transparant corridor-blotch. The mine begins not far from the leaf apex, at first running upwards as a narrow corridor, then reverses and quickly widens to a blotch. A single larva per mine. Frass in isolated grains. Pupation inside or outside the mine (Bladmineerders van Europa).

The mine is illustrated in the Encyclopedia of Life.

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 (1943, as ocellaris) and Spencer (1973), Beri (1984a) and Dempewolf (2004a). The rear end of the body is cut off more or less at a right angle, not obliquely, as in many other Agromyza species. Front spiraculum with 6-8 bulbs in an ellips; rear spiracula on a protuberance, set widely apart (about 4 times their diameter), with 3 bulbs. Mandible alternating, with 2 teeth, the distal one much larger than the proximal. Behind the mandibles a field with fine, recurved spinulation (character of the ambigua species group of Griffiths, 1963a) (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).

Reddish brown; posterior spiracles are on short conical projections and each has 3 bulbs (Spencer, 1976: 140, fig. 252). The puparium is illustrated in the Encyclopedia of Life.

Adult: The adults is illustrated in the Encyclopedia of Life.

Hosts in Great Britain and Ireland:

Arrhenatherum elatius False Oat-grass British Wild Flowers by John Somerville et al. Spencer, 1972b: 122
Bromus villosus     Spencer, 1972b: 122
Calamagrostis epigejos Purple marram British Wild Flowers by John Somerville et al. Spencer, 1972b: 123
Poa compressa Flattened Meadow-grass British Wild Flowers by John Somerville et al. Spencer, 1972b: 124
Poa trivialis Rough Meadow-grass British Wild Flowers by John Somerville et al. Spencer, 1972b: 124
Secale cereale Rye   Spencer, 1972b: 124
Triticum aestivum Bread Wheat   Spencer, 1972b: 125

Hosts elsewhere:

Arrhenatherum       Spencer, 1976: 139
Arrhenatherum       Spencer, 1990: 354
Arrhenatherum       Bladmineerders van Europa
Avena       Bladmineerders van Europa
Brachypodium       Bladmineerders van Europa
Bromus       Spencer, 1976: 139
Bromus       Spencer, 1990: 355
Bromus       Bladmineerders van Europa
Calamagrostis       Spencer, 1976: 139
Calamagrostis       Spencer, 1990: 354
Calamagrostis       Bladmineerders van Europa
Dactylis       Spencer, 1976: 139
Dactylis       Spencer, 1990: 355
Dactylis       Bladmineerders van Europa
Elytrigia repens Common Couch British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Hordeum       Spencer, 1976: 139
Hordeum       Spencer, 1990: 356
Hordeum       Bladmineerders van Europa
Poa       Spencer, 1976: 139
Poa       Spencer, 1990: 355
Poa       Bladmineerders van Europa
Secale       Spencer, 1976: 139
Secale       Spencer, 1990: 356
Secale       Bladmineerders van Europa
Triticum       Spencer, 1976: 139
Triticum       Spencer, 1990: 356
Triticum aestivum Bread Wheat   Bladmineerders van Europa

Time of year - mines: April till September (Bladmineerders van Europa).

Time of year - adults: June-July. Three generations have been observed in England (Spencer, 1976: 141).

Distribution in Great Britain and Ireland: Widespread in Britain including Kent (Darenth), Berkshire (Windsor Forest), Gloucester (nr Bristol), Devon (Brixham and Paignton), Huntingdonshire (Woodwalton Fen), Durham, Sunderland and Banff (Falls of Tarnash) (Spencer, 1972b: 35), Cambridgeshire, Easterness, Fife, Pembrokeshire, South Lancashire and South-west Yorkshire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Austria, Germany, Sweden, Norway, Spain (Spencer, 1976: 139), Belgium (de Bruyn and von Tschirnhaus, 1991), Balearic Is., Belarus, Canary Is., Crete, Croatia, Czech Republic, Dodecanese Is., Estonia, European Turkey, French mainland, Italian mainland, Lithuania, Poland, Romania, Sicily and Slovakia (Fauna Europaea).

NBN Atlas links to known host species:

Arrhenatherum elatius, Calamagrostis epigejos, Elytrigia repens, Poa trivialis, Secale cereale, Triticum aestivum

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea - Links to species no longer available  
Heterolexis balteata (Thomson, 1895) Braconidae: Alysiinae
Opius gracilis Fischer, 1957 Braconidae: Opiinae

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

XHTML Validator Last updated 08-Oct-2019 Brian Pitkin Top of page