miner: The initial mine is usually in the form of a gallery, which expands
to form a blotch. (British
almost full depth blotch with scattered frass. The mine is identical
to that of M. pumilus, but the larva is different (Bladmineerders van Europa).
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).
Larva with two ventral spots, whereas M. pumilis has two
leafminers). The larva is also illustrated in Bladmineerders van Europa.
The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.
Hosts in Great Britain & Ireland:
of year - larvae: Early autumn (British
of year - adults: Currently unknown.
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.
in Great Britain & Ireland: Britain including Berkshire (VC22),
East Suffolk and North Wiltshire (NBN
NBN Grid Map:
elsewhere: Widespread in continental Europe including Austria,
Czech Republic, Estonia, Finland, Germany, Hungary, Italian mainland,
Poland, Russia Central, Sweden and The Netherlands (van Achterberg
in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: