Leaf-mine: The mine is long, filled with green frass to ¼, then linear (British leafminers).

Oviposition generally at the underside of the leaf. The mine is a slender corridor that hardly widens, even towards the end. The first third is stuffed with diffuse greenish brown frass. After a moult the frass pattern changes completely, into a very narrow, continuous black line. The mine often follows a thick vein over a long distance, but the larva is capable of crossing thick veins, even the midrib (Bladmineerders van Europa).

The mine is also illustrated in UKMoths.

Larva: The larva is a greenish white, head brown (British leafminers).

Pale yellowish green, head dark; the larva lies venter-downwards in the mine. See Gustafsson and van Nieukerken (1990a) for a detailed description (Bladmineerders van Europa).

Pupa: Details unknown.

Adult: Not illustrated in UKMoths (check for update). The genitalia are not illustrated by the Lepidoptera Dissection Group (check for update).

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: Mid June - early July (British leafminers; UKMoths).

Time of year - adults: Single-generation on the wing in May (UKMoths).

Distribution in Great Britain and Ireland: Fairly common throughout the British Isles (UKMoths) including Bedfordshire, Buckinghamshire, Caernarvonshire, Cambridgeshire, Carmarthenshire, Cheshire, Denbighshire, Derbyshire, East Kent, East Norfolk, East Ross, East Suffolk, Easterness, Glamorgan, Herefordshire, Huntingdonshire, Kincardine, Mid-west Yorkshire, Middlesex, Monmouthshire, North Aberdeen, North Devon, North Ebudes, North Essex, North Hampshire, North Somerset, North Wiltshire, Northamptonshire, Shropshire, South Aberdeen, South Hampshire, South Lancaster, South Wiltshire, South-east Yorkshire, South-west Yorkshire, Stafford, Surrey, Warwickshire, West Gloucestershire, West Kent, West Lancaster, West Norfolk, West Suffolk, Westmorland and Worcestershire (NBN Gateway - N.B. includes Watsonian Vice Counties having publicly available records that fall within or overlap the vice county border at 10km resolution or better i.e. a record for a vice county may relate to an adjacent vice county - for included datasets see NBN Grid map below). See also British leafminers distribution map.

Also recorded in the Republic of Ireland (Karsholt and van Nieukerken in Fauna Europaea).

NBN Grid map: Note that not all datasets on the NBN Gateway may be available on the map below. If you are an NBN Gateway registered user you can request access for missing datasets via the link 'Open interactive map in new window' below.

Distribution elsewhere: Widespread in continental Europe including Austria, Belgium, Croatia, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Italian mainland, Latvia, Lithuania, Norwegian mainland, Poland, Portuguese mainland, Romania, Russia - Central, North and Northwest, Slovakia, Slovenia, Sweden, Switzerland, The Netherlands and Yugoslavia.

Also recorded in East Palaearctic (Karsholt and van Nieukerken in Fauna Europaea).

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: