urticae Nowakowski, 1964. Dt. ent. Z.  11:
192. [Preoccupied by Agromyza urticae Watt, 1924: 685]
Agromyza pseudoreptans Nowakowski, 1967. Polskie Pismo
ent. 37: 658
Agromyza pseudoreptans Nowakowski, 1967; Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 34 (figs 92-3), 35,
Agromyza pseudoreptans Nowakowski, 1967; Spencer, 1976.
Fauna ent. Scand. 5(1): 136, figs 241-3.
Agromyza pseudoreptans Nowakowski, 1967; Spencer, 1990.
Host specialization in the world Agromyzidae (Diptera)
: 54, 57, 58 (fig. 217), 93, 198, 299.
forming an irregular elongate linear blotch mine, normally adjoining
margin of leaf (Spencer, 1976:
Forms a long blotch mine, which is usually adjacent to the edge of the leaf, which turns black (British
depth corridor, mostly beginning at the leaf margin, and never starting
with a closely set, intestine-like, number of curves. Further on
the corridor considerably widens, mostly keeping close to the leaf
margin. Often several larvae in a mine. Frass in lumps or short
rods, never in long threads. 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.
The larva is described by Dempewolf (2001: 48). Posterior spiracles each with 3 bulbs, surrounded
by four groups of hairs (Spencer, 1972b: 35, fig. 93).
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).
Yellow-orange (Bladmineerders van Europa) to reddish-brown (Spencer,
Hosts in Great Britain & Ireland:
of year - mines: July; October (British
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread and common in Britain
including London (Hampstead), Surrey (Box Hill), Suffolk (Boyton),
Dunbarton (Bonhill) (Spencer, 1972b: 35), Warwickshire (Exhall) (Robbins,
1991: 71), Breconshire (VC42), Caernarvonshire (VC49), Cambridgeshire (VC29), Carmarthenshire (VC44),
Cheshire (VC58), Denbighshire (VC50), East Kent (VC15), East Sussex (VC14), Elgin, Flintshire (VC51),
Glamorganshire (VC41), Herefordshire (VC36), Huntingdonshire (VC31), Mid-west Yorkshire (VC64), Middlesex (VC21),
Monmouthshire (VC35), North Essex (VC19), Northamptonshire (VC32), South Somerset (VC5), Staffordshire (VC39),
Surrey (VC17), West Gloucestershire (VC34), West Kent (VC16) and West Sussex (VC13) (NBN
recorded in the Republic of Ireland: Co. Clare (Dunratty) (Spencer, 1972b: 35).
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Distribution elsewhere: Widespread in continental Europe including Poland,
Germany, Italy (Spencer, 1976:
137), The Netherlands, Luxembourg (Bladmineerders van Europa), Belgium (Scheirs,
de Bruyn and von Tschirnhaus, 1996), Czech Republic, Estonia,
Finland, French mainland, Hungary, Lithuania, Slovakia (Martinez
in Fauna Europaea).
widespread in Canada (Spencer,
1969a: 54-5) and the U.S.A. (Frick,
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British and Irish Parasitoids in Britain and elsewhere: