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Leaf-miner: The pale-coloured mine runs on the upper side irregularly to the sides, in the middle with blackish spots, where the frass is deposited. It starts in the center of a leaf and without a small mine leading to a large mine. Many mines in a leaf could finally cover the whole leaf (British leafminers).

Mine of Pegomya nigrisquama Image: © Rob Edmunds (British leafminers)

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: Ackland in Chandler (1978) did not indicate whether his host records were British or Foreign and are therefore included under 'Hosts in Britain' and 'Hosts elsewhere

Hosts in Great Britain and Ireland:

Asteraceae
? Aster	bellidiastrum			Ackland in Chandler, 1978: 228
Aster	bellidiastrum			British leafminers
? Solidago	virgaurea	Goldenrod		Ackland in Chandler, 1978: 228
Solidago	virgaurea	Goldenrod		British leafminers

Hosts elsewhere:

Asteraceae
Aster				Hering, 1957
? Aster	bellidiastrum			Ackland in Chandler, 1978: 228
Aster	bellidiastrum			Bladmineerders van Europa
? Solidago	virgaurea	Goldenrod		Ackland in Chandler, 1978: 228
Solidago				Hering, 1957
Solidago	virgaurea	Goldenrod		Bladmineerders van Europa

Time of year - mines: Autumn.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Recorded in Britain by Ackland (1978). Rarely found in the the UK. Recorded from Somerset, Oxford, Suffolk and Cambridge (British leafminers); Cambridgeshire, Dumfriesshire, Forfar, Middlesex, Oxfordshire, Peebles, West Gloucestershire, West Kent and West Suffolk (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Czech Republic, French mainland, Germany, Poland, Slovakia and Switzerland (Michelsen in Fauna Europaea).

NBN Atlas links to known host species:

British and Irish Parasitoids in Britain and elsewhere: