primary blotch-mine, which entirely fills a leaf and usually shows
some reddish colouration; frass in distinct grains (Spencer, 1972b: 41).
in the tip of a leaflet, Primary blotch without a preceding corridor;
distal half mostly a red colouration. The blotch is upper-surface
with a few full depth patches, making it look spotty in transparency.
Frass in groups of grains. Pupation outside the mine (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. Yellow.
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).
Hosts in Great Britain & Ireland:
of year - mines: June-July.
of year - adults: Currently unknown.
in Great Britain & Ireland: Surrey (Betchworth and Coulsdon)
(Spencer, 1972b: 41) and
Sussex (Chailey) (Spencer, 1972b:
41, as rubiginosa). (NBN Gateway).
elsewhere: Widespread in continental Europe including Denmark,
Germany, Norway, Sweden (Spencer,
1976: 106), Czech Republic, French mainland, Italian mainland,
Lithuania, Poland 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.