miner: Transparent blotch, starting at the leaf margin, quickly turning
brown. Frass in scattered grains (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).
The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.
Pupation outside the mine (Bladmineerders van Europa).
Hosts in Great Britain & Ireland:
of year - larvae: May
(Bladmineerders van Europa).
of year - adults: Currently unknown.
Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta.
in Great Britain & Ireland: Bedfordshire (VC30), Buckinghamshire
and Hertfordshire (NBN
Gateway, as Messa glaucopis).
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe including Belgium, Croatia,
Czech Republic, Finland, French mainland, Germany, Italian mainland,
Poland, Russia - Central and Sweden (van Achterberg in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: Unknown.