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Leaf-mine:
The mine is underside, between veins, narrow and close to midrib
(British
leafminers). Often there are several to one leaf, and have a
distinct brown tinge (UKMoths).
The mine is also illustrated in Nederlandse
bladmineerders.
Larva:
Details unknown.
Pupa:
The
pupa is illustrated in Nederlandse
bladmineerders.
Hosts
in Britain:
Hosts
elsewhere:
Time
of year - mines: July, September - October (British
leafminers).
Time
of year - adults: Two generations, flying in May and late July
and August (UKMoths).
Distribution
in Britain: Occurs in widely separated colonies around its foodplant
Grey Alder. It is known from a few isolated places ranging from
north-west Britain, through Wales and down to East Anglia and southern
Britain (UKMoths)
including East Kent, East Ross, East Suffolk, East Sutherland, Easterness,
Hereford, North Ebudes, South Aberdeen, South Lancaster, South-west
York, West Gloucester and Worcester (NBN
Gateway distribution map - BRERC,
GiGL, HBRG,
NE,
SNH and SHWRG).
See also British
leafminers distribution map.
It
can be locally very common where it occurs (UKMoths).
Distribution
elsewhere: Widespread in Europe including Albania, Austria,
Belgium, Bulgaria, Corsica, Czech Republic, Danish mainland, Estonia,
Finland, French mainland, Germany, Hungary, Italian mainland, Latvia,
Lithuania, Norwegian mainland, Poland, Romania, Russia - Central,
East, North and Northwest, Slovakia, Sweden, Switzerland, The Netherlands
and Ukraine. Also recorded in East Palaearctic (Karsholt & van
Nieukerken in Fauna
Europaea).
Parasitoids:
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