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Leaf-miner: Details unknown.

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 record was British or Foreign and are therefore tentatively included under 'Hosts in Britain' and 'Hosts elsewhere'.

Hosts in Great Britain and Ireland:

Brassicaceae
? Nasturtium	officinale	Water-cress		Irwin and Chandler in Chandler, 1978: 225, as Hydrellia nasturtii

Hosts elsewhere:

Brassicaceae
? Nasturtium	officinale	Water-cress		Irwin and Chandler in Chandler, 1978: 225, as Hydrellia nasturtii
Nasturtium				Hering, 1957

Time of year - mines: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Recorded in Britain by Irwin (1978); South Hampshire, Surrey and West Gloucestershire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Belgium, Bulgaria, French mainland, Greek mainland, Italian mainland, Sardinia, Sicily and Yugoslavia (Zatwarnicki, 2004 in Fauna Europaea).

NBN Atlas links to known host species:

British and Irish Parasitoids in Britain and elsewhere: