Leaf-mine: Mine long and narrow, white, with frass in conspicuous, widely spaced black lumps. Pupation in the mine adjoining a vein, with anterior spiracles projecting through the epidermis (Spencer, 1976: 472).

Untidy, generally for most part upper-surface, corridor. Frass in widely scattered, relatively large, grains. Pupation wthin the mine, generally in a lower-surface pupal chamber (Bladmineerders van Europa).

Mine long and narrow, white, with frass in conspicuous,widely spaced black lumps. Pupation in the mine adjoining a vein, with anterior spiracles projecting through the epidermis. Anterior spiracles divided into two arms; posterior spiracles each on a large, widely-separated conical protuberance, with a total of up to 30 minute pores (British leafminers).

Larva: The larva is described by Dempewolf (2001: 206) and Ellis (Bladmineerders van Europa).

Puparium: Varies from whitish to reddish-brown. Anterior spiracles divided into two arms; posterior spiracles each on a large, widely-separated conical protuberance, with a total of up to 30 minute bulbs (Spencer, 1976: 472). The anterior spiracles of the puparium, that are unusually long, penetrate the epidermis, as is the rule in the genus Chromatomyia (Bladmineerders van Europa).

Anterior spiracles projecting through the epidermis. Anterior spiracles divided into two arms; posterior spiracles each on a large, widely-separated conical protuberance, with a total of up to 30 minute pores (British leafminers).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: January, June-November.

Time of year - adults: July.

Distribution in Great Britain and Ireland: Common and widespread throughout England and Scotland, including Perthshire (Killin), Sutherland (Lairg) (Spencer, 1972: 94), Inner Hebrides (Isle of Coll) (Bland, 1992), Rum (Bland in Whiteley, 1994), Warwickshire (Coventry) (Robbins, 1991: 94), Channel Is. (Martinez in Fauna Europaea), Dorset, East Sussex, Edinburgh, Isle Of Wight, Merionethshire, North Ebudes, North Essex, North Somerset, South Devon, South Somerset, South Wiltshire, Surrey, 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).

Also recorded in the Republic of Ireland: Co. Clare (Burren) and Co. Kerry (Kilarney) (Spencer, 1972: 94).

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 western Europe, including Denmark, Finland, Sweden (Spencer, 1976: 472), The Netherlands (Bladmineerders van Europa), Belgium (de Bruyn and von Tschirnhaus, 1991), Germany (Spencer, 1976: 574), Poland (Spencer, 1990: 90), Canary Is., Czech Republic, French mainland, Italian mainland, Kaliningrad Region, Lithuania and Spanish mainland (Martinez in Fauna Europaea).

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

Parasitoids in Britain and elsewhere: