Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Juncus
|
1a >
Leaf-miner and case-bearer: The full grown larval case is very similar to that of C.
alticolella, but the larvae can be differentiated. |
On Juncus in Britain. Host elsewhere unknown. Widespread
in Britain and continental Europe. Also recorded in the Republic
of Ireland.
|
Coleophora
glaucicolella Wood, 1892 [Lepidoptera: Coleophoridae]. |
1b>
Miner, but not a case-bearer |
2 |
2a >
Leaf miner: The mine begins as a narrow corridor, somewhere halfway along the
leaf; it ascends towards the tip, doubles, and descends to about
the starting point. Meanwhile the corridor has widened to about
half the width of the leaf. Most frass is accumulated as an elongate
dark mass in the oldest part of the mine. According to Traugott-Olsen
and Nielsen part of the frass can be ejected through an opening
in the lowest part of the mine. The mine is greenish white and quite
conspicuous. Pupation external; pupa in a loose spinning (Bland,
1996a; Traugott-Olsen and Nielsen, 1977a). |
On Juncus in Britain and Juncus and Scirpus elsewhere. Britain including South Hants (and the Channel Is.
Also
recorded in the Republic of Ireland. Widespread in continental
Europe.
|
Elachista
scirpi Stainton, 1887 [Lepidoptera: Elachistidae]. |
2b >
Leaf miner: The
mine begins somewhere halfway the blade as an upwards running corridor.
After a while the direction reverses, and an elongate blotch develops
occupying half the width of the leaf. Frass, light green at first,
grey later, concentrated in the lowest part of the mine. Pupation
external. |
On Carex, but not yet on Juncus, in Britain
and Carex, Festuca, Juncus and Scirpus elsewhere.
Britain including East Kent, North Hants and South Devon. Also
recorded in the Republic of Ireland. Widespread in continental
Europe.
|
Elachista
utonella Frey, 1856 [Lepidoptera: Elachistidae]. |
2c >
Leaf miner: Elongated,
mainly interparenchymal mine in the part of the stem above the flower
stalk. Frass in one large mass. Pupation internal. |
On Juncus effusus in Britain and this and other Juncus species elsewhere. Widespread in Britain. Widespread and frequently
common in much of Europe. Also recorded in the U.S.A. and Canada.
|
Cerodontha
luctuosa (Meigen) [Diptera: Agromyzidae]. |
2d > Leaf-miner: Pale
coloured corridor (here and there with even paler segments). Pupation
within the mine. |
On ? Juncus in Britain. On Juncus and Phragmites elsewhere. Widespread in Britain and continental Europe
|
Thrypticus
bellus Loew, 1869 [Diptera:
Dolichopodidae] |