 |
| |
(Coleoptera, Diptera, Hymenoptera and Lepidoptera)
by
Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds
|
|
|
|
DIGITARIA.
Finger-grasses. [Poaceae]
|
|
Twenty
species of Digitaria are recorded in Britain. All are introduced.
Two British miners are recoded on Digitaria.
A key to the European miners recorded on Digitaria is provided in Bladmineerders van Europa.
Nearly 100 British miners or possible miners are recorded on grasses in Britain.
It is recommended that adults of all miners on grasses be reared to be certain of their identity. |
Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Digitaria
|
1a > Leaf-miner: 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. |
On Bromopsis, Dactylis, Elymus and Phalaris, but not yet on Digitaria, in Britain
and additional grasses, including Elytrigia, elsewhere. Widespread in Britain. Also
recorded in the Republic of Ireland. Widespread and common in continental Europe. Also recorded in Japan, U.S.A. and Canada.
|
Cerodontha
incisa (Meigen, 1830) [Diptera: Agromyzidae]. |
1b > Leaf-miner: Irregular
mine, locally shallow, elsewhere much deeper, giving it a mottled
appearance. In broadleaved plants the mine often begins as a blotch
with stellate extensions, but sometimes as a very fine, shallow
corridor. In grasses the mine often begins in the leaf sheath. The
frass is very fine-grained, initially scattered, later in aggregates. |
Mine
of Hydrellia griseola on Glyceria fluitans
Image: © Willem Ellis (Bladmineerders van Europa) |
|
Polyphagpus. On
? Alisma, ? Damasonium,
? Sagittaria, ? Bellis,
? Rorippa, Tropaeolum, ? Lychnis,
? Stellaria,
? Carex,
? Cyperus,
? Scirpus,
? Hydrocharis,
? Stratiotes,
? Lamium,
? Lemna,
? Allium, Arrhenatherum,
? Polygonum,
? Potamogeton,
? Veronica,
? Typha, but not yet on Digitaria, in Britain.
On ? Alisma,
? Damasonium, ? Sagittaria,
? Bellis, ? Rorippa, Tropaeolum, Lychnis,
? Stellaria, Carex,
? Scirpus, Trifolium,
? Hydrocharis, Lamium,
? Lemna, Allium, Papaver, Agrostis, Alopecurus, Apera, Arrhenatherum, Avena, Avenula, Brachypodium, Briza, Bromus, Calamagrostis, Dactylis, Desmazeria, Digitaria, Echinochloa, Eleusine, Elymus, Festuca, Gaudinia, Glyceria, Holcus, Hordeum, Lagurus, Lolium, Panicum, Phalaris, Phleum, Phragmites, Poa, Secale, Setaria, Triticum,
? Polygonum, ? Potamogeton, Veronica, ? Typha and Verbena elsewhere.
Widespread in England. Also recorded in the Republic of Ireland.
Widespread in the Palaearctic region. Also recorded from Nearctic
and Australasian Regions.
|
Hydrellia
griseola (Fallén, 1813) [Diptera: Ephydridae]. |
|
