inconspicuous external stem mine, frass in widely-spaced grains.
Pupation in the mine (Spencer, 1972b: 27).
mine begins as a corridor in a leaf, descends from there as a rind
mine; there also the pupation (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.
The larva is described by de Meijere (1937:
186, as O. sp.) and Dempewolf (2001: 77).
Posterior spiracles each with 4-5 bulbs (Bladmineerders van Europa).
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).
Black; posterior spiracles each with 4-5 bulbs (Spencer, 1972b: 27).
Galium mollugo is treated
as Galium album (Hedge Bedstraw)
by Stace (2010).
Hosts in Great Britain & Ireland:
of year - mines:
June-July and August-September (Hering,
of year - adults: August-September.
in Great Britain & Ireland: Uncommon. Suffolk (Woodditton
Wood) and Surrey (Betchworth) (Spencer, 1972b: 27).
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe including Germany (Dempewolf,
2001: 77; Bladmineerders van Europa), Corsica, Czech Republic, French mainland, Lithuania,
Poland, Slovakia and Spanish mainland (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.