Leaf
miner: The mine begins with short, rather broad corridor, that often is
overrun by the later, large, very transparent full depth blotch.
The mine begins somewhere in the centre of the leaf. Frass in many
loose grains (Bladmineerders van Europa).
The
mine is also illustrated in British
leafminers.
Larva:
The larvae of sawflies have a head capsule, chewing mouthparts with opposable mandibles, six thoracic legs and abdominal legs (although they may be reduced) (see examples).
The pale larva is illustrated in British
leafminers and Bladmineerders van Europa.
Pupa:
The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.
Outside the mine (British
leafminers).
Adult:
The adult is illustrated in ECatSym - Electronic World Catalog of Symphyta.
Hosts in Great Britain and Ireland:
Hosts
elsewhere:
Time
of year - larvae: Bivoltine: summer and early autumn (British
leafminers).
Time
of year - adults: Currently unknown.
Comments:
Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta.
See (British Leafminers Newsletter) for a A Guide to the British Metallus species.
Distribution
in Great Britain and Ireland: Local (British
leafminers). Britain including North Wiltshire (NBN
Atlas)
Distribution
elsewhere: Widespread in continental Europe including Austria,
Belgium, Bulgaria, Czech Republic, Estonia, Finland, French mainland,
Germany, Hungary, Latvia, Poland, Romania, Russia - East, Slovakia,
Sweden, and Ukraine. Also recorded in the Nearctic region (Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
Currently unknown.
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