de Meijere, 1924. Tijdschr. Ent. 67: 130
Agromyza johannae de Meijere, 1924; Hendel, 1931. Fliegen
palaearkt. Reg. 6(2): 126
Agromyza johannae de Meijere, 1924; Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 40 (figs 122-3), 42, 117, 118
Agromyza johannae de Meijere, 1924; Spencer, 1976. Fauna
ent. Scand. 5(1): 116-7, figs 188-90.
Agromyza johannae de Meijere, 1924; Spencer, 1990. Host
specialization in the world Agromyzidae (Diptera) : 113, 135,
138 (fig. 523), 139, 178.
initially linear leaf-mine, normally adjoining leaf-margin and running
towards apex of leaf, then turning and widening into a blotch in
the area of the mid-rib (Spencer, 1972b: 40, fig. 123; Spencer,
1976: 117, fig. 190).
upper-surface corridor. The corridor begins near the base of a leaflet,
runs along the margin to the tip, then, quickly widening, redescends
over the midrib towards the base of the leaflet. Frass in the corridor
part in fine grains, further up in small clumps. Pupation outside
the mine. Older mines turn black and then are somewhat easier to
find (Bladmineerders van Europa).
A narrow corridor along the leaf edge, turning and making a blotch in the midrib area (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 larva is described by Allen (1958),
Dempewolf (2001: 57), de Meijere (1925) and in 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).
Reddish-orange; posterior spiracles each with 3 bulbs (Spencer,
Hosts in Great Britain & Ireland:
of year - mines: June-August.
of year - adults: Currently unknown.
in Great Britain & Ireland: Common in gardens in Britain
where Cytisus is frequently
cultivated (Spencer, 1976)
including London (Hampstead), Hertfordshire (Barnet), Surrey (Headley)
(Spencer, 1972b: 42), Warwickshire
(Keresley) (Robbins, 1991:
42), Inverness (Aviemore) (Spencer, 1972b: 42), Rum (Bland in Whiteley, 1994) and Hampshire (Fleet)
leafminers) and Northern Ireland: Belfast (Spencer, 1972b: 42); East Sussex (VC14), Shropshire (VC40), Stafford and Worcestershire (VC37) (NBN
elsewhere: Widespread in continental Europe, including Denmark,
Norway and Sweden (Spencer, 1976:
117), The Netherlands, Belgium and Luxembourg (Bladmineerders van Europa), Germany (Spencer,
1976: 546; Dempewolf, 2001:
57), Crete, Czech Republic, Dodecanese Is., Estonia, French mainland,
Italian mainland, Lithuana, Poland and Sicily (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: