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BROMUS. Bromes. [Poaceae]

Twenty one species of Bromus are recorded in Britain. These include the native Meadow Brome (B. commutatus), Soft-brome (B. hordeaceus), with five subspecies), Smooth Brome (B. racemosus) and Interrupted Brome (B. interruptus). Seven dipterous miners, the agromyzids Agromyza albipennis, Agromyza bromi, Agromyza mobilis, Agromyza rondensis, Cerodontha incisa, Cerodontha pygmaea and Liriomyza flaveola, are recorded on Bromus in Britain. Miners on grasses should, where possible, be reared to confirm their identity. Elsewhere the agromyzids Agromyza bromi, Agromyza intermittens, Agromyza mobilis, Agromyza rondensis, Cerodontha flavocingulata, Cerodontha incisa, Cerodontha muscina and Liriomyza flaveola and the ephydrid Hydrellia griseola are recorded mining Bromus. One non-dipterous miner is recorded on Bromus in Britain (see below). Elsewhere six additional British non-dipterous miners are recorded on Bromus (see below).

Bromus inermis

Key for the identification of the known Diptera mines in Britain.

#> Details of mine unknown. Puparium dark brown Agromyza bromi Spencer [Agromyzidae]. 1> Broad elongated mine; the form is dependent of the leaf form of the host plant. Frass green. Usually a number of larvae together in a mine. Pupation in the mine. Puparium shining, metallic blue-black Cerodontha (Poemyza) incisa (Meigen) [Agromyzidae]. -> Normally several larvae feed together. Pupation in the mine. Puparium shining black Cerodontha (Poemyza) pygmaea (Meigen) [Agromyzidae]. -> Long upper surface mine, often with several larvae feeding together side by side. Agromyza mobilis Meigen [Agromyzidae]. -> Larvae feed singly, forming an upper surface linear-blotch mine. Pupation either internal or external. Puparium reddish, brown or black, loosely glued to the leaf. Mine of Agromyza albipennis on Phalaris arundinacea. Image: Willem Ellis (Source: Nederlandse bladmineerders) Agromyza albipennis Meigen [Agromyzidae]. -> Mine greenish with only single larva, initially running towards apex of leaf before turning back down and developing into a broad blotch. Puparium reddish brown. Agromyza rondensis Strobl [Agromyzidae]. -> A narrow whitish linear mine, running down the leaf from the apex, with frass in two rows of separate grains. Pupation external. Puparium orange-yellow to reddish Mine of Liriomyza flaveola on Festuca gigantea. Image: Willis Ellis (Source: Nederlandse bladmineerders) Liriomyza flaveola (Fallén) [Agromyzidae].

Non-dipterous miners recorded on Bromus in Britain Elachista megerlella Stainton, 1854 Lepidoptera: Elachistidae     Additional British non-dipterous miners recorded on Bromus elsewhere Coleophora lixella Zeller, 1849 Lepidoptera: Coleophoridae     Elachista albifrontella (Hübner, 1817) Lepidoptera: Elachistidae Elachista argentella (Clerck, 1759) Lepidoptera: Elachistidae Elachista atricomella Stainton, 1849 Lepidoptera: Elachistidae   Elachista cingillella (Herrich-Schäffer, 1855) Lepidoptera: Elachistidae     Elachista maculicerusella (Bruand, 1859) Lepidoptera: Elachistidae

Last updated 28-Aug-2008  Brian Pitkin

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