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#>Details
of mine unknown.
Delia
kullensis (Ringdahl) [Anthomyiidae].
#>Details
of mine unknown.
Delia
pruinosa (Zetterstedt) [Anthomyiidae].
1>
Leaf-mine or stem-mine.
2.
->Leaf
and stem-mine. Mine always arising from the leaf base or ending
in it, because the larva mines and changes leaves. Mine often broad,
irregular corridor like, often touching the midrib. At first corridor
often entirely without frass, later in the spring the mines are
often less deep, containing thick, irregularly deposited frass lumps.
Delia
cardui (Meigen) [Anthomyiidae].
->Leaf
and stem mine. Apart from mining leaves the stems are excavated.
Oviposition takes place on the tips of shoots. The larva at first
mines strip-like full depth corridors in the apical leaves, going
then into the stem, which it hollows out, so that it becomes translucent.
It then searches out leaves further down in which initially it mines
depositing frass in strips, but then in blotches. The corridors
often lie in one half of the leaf and can be branched. In the blotches
the frass is irregularly scattered. Pupation is in the hollow stem
or in the ground.
Delia
echinata (Séguy) [Anthomyiidae].
2>
A shallow external stem-mine. Pupation in the mine. Puparium pale
brown
Ophiomyia
melandricaulis Hering [Agromyzidae].
->Leaf
mine.
3.
3>
A white linear-blotch mine, the linear section sometimes not detectable
as it becomes enveloped in later blotch. Puparium reddish brown
Amauromyza
(Trilobomyza) flavifrons (Meigen)
[Agromyzidae].
->Upper
side blotch mine beginning with a deeper, almost full depth corridor.
Frass grains not in thread-like pieces, irregularly scattered. In
the large, later blotch indistinct primary and secondary frass lines
are found; the frass accumulated in the middle.
Pegomya
flavifrons (Walker) [Anthomyiidae].
->Large blotch mine, often with several larvae, beginning with
a short deeper corridor at a single egg shell on the surface of
the leaf. The broad deep corridor later ends in a blotch but can
be recognised (beneath the blotch) by its greater depth. Mine predominantly
dorsal or ventral, greenish in transmitted light. Frass grains irregularly
scattered except in the initial corridor.
Pegomya
hyoscyami (Panzer) [Anthomyiidae].
->Corridor-blotch
mine. Mine begins as a normally upper surface deep corridor and
becomes a blotch lying centrally in the leaf, often touching the
leaf petiole, if leaves are small larva may mine across the stem
to another leaf. Pupation internal or external, sometimes in a separate
pupation mine. Frass partly in grains or streaks but mainly in clumps
towards margins of blotch.
Scaptomyza
graminum (Fallén) [Drosophilidae].
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