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Leaf-miner: A number of short, rather broad corridors that enter the blade from the midrib. Pupation within the mine, mainly in the leaf base and the midrib. At the moment only adult flies can be separated from H. stratiotae. (Bladmineerders van Europa).

Larva: The larvae of flies are leg-less maggots without a head capsule (see examples). They never have thoracic or abdominal legs. They do not have chewing mouthparts, although they do have a characteristic cephalo-pharyngeal skeleton (see examples), usually visible internally through the body wall.

Puparium: The puparia of flies are formed within the hardened last larval skin or puparium and as a result sheaths enclosing head appendages, wings and legs are not visible externally (see examples).

Comments: Irwin and Chandler in Chandler (1978) did not indicate whether their host records are British or Foreign and are therefore tentatively included under 'Hosts in Britain and/or elsewhere' as are the records by Pitkin & Plant, which were previously assumed to be British. The record of this species on Lemna is dicounted.

Hosts in Britain and/or elsewhere:

Alismataceae
? Alisma	plantago-aquatica	? Water-plantain		Irwin and Chandler in Chandler, 1978: 225
Alisma	plantago-aquatica	Water-plantain		Bladmineerders van Europa
Hydrocharitaceae
? Hydrocharis	morsus-ranae	? Frog-bit		Irwin and Chandler in Chandler, 1978: 225
? Stratiotes				Pitkin & Plant
? Stratiotes	aloides	? Water-soldier		Irwin and Chandler in Chandler, 1978: 225
Stratiotes	aloides	Water-soldier		Bladmineerders van Europa

Time of year - mines: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Recorded in Britain (Irwin and Chandler in Chandler, 1978); Cambridgeshire, Dorset, East Kent, Glamorgan, Huntingdonshire, Monmouthshire, South Hampshire, South-west Yorkshire and West Gloucestershire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Austria, Belgium, Czech Republic, Germany, Hungary, Poland, Sweden and The Netherlands (Zatwarnicki, 2004 in Fauna Europaea).

NBN Atlas links to known host species:

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