linear leaf-mine, widening irregularly; frass in two conspicuous
black strips (Spencer, 1972b:
35, fig. 186).
narrow, little widening corridor, often following a vein for a considerable
distance. The thin leaves easily tear here, also because the mine
is relatively deep. Frass in two neat rows of grains along the sides.
Pupation outside the mine; unlike A.
flaviceps on the same hostplant, the exit slit is in the upper
epidermis (Bladmineerders van Europa).
A short, irregular narrow gallery. Frass in conspicuous black stripes (British
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 white larva is described by de Meijere (1925)
and in Bladmineerders van Europa ; posterior spiracles each with 3 bulbs on a large
conical projection (Spencer,
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.
of year - adults: Currently unknown.
in Great Britain & Ireland: Kent (Sittingbourne) and Hampshire
(Isle of Wight) (Spencer, 1972b:
35) and Worcestershire (VC37) (NBN
elsewhere: Widespread in continental Europe including Denmark,
Finland, Norway, Sweden (Spencer,
1976: 114), The Netherlands (Bladmineerders van Europa), Germany (Spencer,
1976: 546), Austria, Czech Republic, Poland and Slovakia (Martinez
in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.