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Leaf miner: A large blotch mine is formed from the tip of a leaf (as shown). The pupa is formed in the disc - as above (top right). The species has a long feeding period, more than two months (similar to Heterarthrus nemoratus).

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 larva is illustrated in British leafminers.

Pupa: The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.

Adult: Details unknown.

Hosts in Great Britain and Ireland:

Aceraceae
Acer	campestre	Field maple		British leafminers
Acer	pseudoplatanus	Sycamore		British leafminers

Hosts elsewhere:

Aceraceae
Acer	campestre	Field maple		Bladmineerders van Europa
Acer	pseudoplatanus	Sycamore		Bladmineerders van Europa

Time of year - larvae: August - September (British leafminers). Completed mines may be found at the end of July in lower regions of Austria. (British leafminers).

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Fleet, Hants (British leafminers).

Distribution elsewhere: Widespread in continental Europe including Austria, Czech Republic, Germany, Hungary, ? Italian mainland, Poland, Slovakia and Ukraine (Fauna Europaea).

NBN Atlas links to known host species:

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.