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 bromi Spencer, 1966
[Diptera: Agromyzidae]

Agromyza bromi Spencer, 1966c. Beitr. Ent. 16(3-4): 286
Agromyza bromi Spencer, 1966c; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 31, 32 (fig. 81), 33
Agromyza bromi Spencer, 1966c; Spencer, 1976. Fauna ent. Scand. 5(1): 101-2, figs 151-3
Agromyza bromi Spencer, 1966c; Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 355, 358 (figs 1337-8), 359.

Leaf-miner: Details of mine and larva unknown. Because the adult fly closely resembles that of A. nigrella, possibly this applies as well to mine and larvae (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.

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 widely separated, each with 3 bulbs. (Spencer, 1976: 102).

Rear spiracula not on a common base, with 3 bulbs (Spencer, 1966a) (Bladmineerders van Europa).

Hosts in Great Britain and Ireland:

Bromopsis ramosa Hairy brome British Wild Flowers by John Somerville et al. Robbins, 1991: 135
Ceratochloa unioloides     Pitkin & Plant

Hosts elsewhere:

Bromus       Spencer, 1990: 355
Bromus catharticus     Bladmineerders van Europa
Bromus catharticus     Spencer, 1976: 102
Bromus catharticus     Spencer, 1972b: 33
Bromopsis ramosa Hairy brome British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - mines: Currently unknown.

Time of year - adults: June-July.

Distribution in Great Britain and Ireland: Kent (Dartford), Suffolk (Felixstowe and Newmarket) (Spencer, 1972b: 33), Warwickshire (Sowe Common) (Robbins, 1991: 135) and Cambridgeshire, South-west Yorkshire and West Gloucestershire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Denmark (Spencer, 1976: 102), The Netherlands, Belgium (Bladmineerders van Europa), Germany (Spencer, 1976: 546), Czech Republic, French mainland, Hungary, Lithuania, Poland, Slovakia and Switzerland (Fauna Europaea).

NBN Atlas links to known host species:

Bromus catharticus, Bromopsis ramosa

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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