dipsaci Hendel, 1927a. Zool. Anz. 69: 251
Agromyza dipsaci Hendel, 1927a; Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 36 (figs 99-100), 38, 116
Agromyza dipsaci Hendel, 1927a; Spencer, 1990. Host
specialization in the world Agromyzidae (Diptera) : 242, 243
(figs 913-4), 244.
funnel-shaped blotch mine at margin of leaf (Spencer, 1972b: 36 (fig. 100), 38).
Forms a long mine, which rapidly broadens, at the leaf edge. The mine turns brown. (British
invariably beginning at the leaf margin, widening fast and strongly,
giving the mine a funnel-like shape. Primary and secondary feeding
lines very conspicuous. Frass in large grains. The larvae leaves
the mine before pupation; according to Spencer (1954)
the exit slit is in the lower epidermis (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.
Posterior spiracles witth about 40 bulbs (Groschke, 1957a; Hering, 1957a) (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).
Hosts in Great Britain & Ireland:
of year - mines: June-July.
of year - adults: June. Only a single generation in summer.
in Great Britain & Ireland: Uncommon in England including
Middlesex (Scratch Wood), Surrey (Chelsham) and Huntingdonshire
(Monk's Wood) (Spencer, 1972b:
38), Surrey (Godstone) (pers. observation) and West Gloucestershire
NBN Grid Map:
elsewhere: Widespread in continental Europe including Belgium
(Bladmineerders van Europa), Austria, Czech Republic, French mainland, Germany,
Hungary and Slovakia (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: