atra Hardy, 1850a. The North British Agriculturalist and
Journal of Horticulture. 3rd Aug. 1850: 486. [Preoccupied
by Agromyza atra Meigen, 1830, now Cerodontha (Poemyza)
atra (Meigen, 1830)]
Agromyza lathyri Hendel, 1923a. Dt. ent. Z. 1923(4):
Agromyza lathyri Hendel, 1923a; Hendel, 1931. Fliegen
palaearkt. Reg. 6(2): 128
Agromyza lathyri Hendel, 1923a; Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 37 (fig. 112), 41, 117
Agromyza lathyri Hendel, 1923a; Spencer, 1976. Fauna
ent. Scand. 5(1): 118, figs 193-6.
Agromyza lathyri Hendel, 1923a; Spencer, 1990. Host
specialization in the world Agromyzidae (Diptera) : 112. 127,
129 (figs 465-7)
Calyptomyza atra Hardy, 1850a; Bland, 2000. Dipterists
Digest 7: 9-14.
initially lower-surface linear leaf-mine, which later develops into
large whitish blotch and appears pale and mottled from above, due
to the variable depth of larval feeding. Less frequently feeding
in upper surface or stem (Spencer, 1972b: 37, fig. 112); Spencer,
mine starts as a superficial lower-surface corridor. After its first
moult the larva starts making a blotch, often close to the base
of the leaflet. The blotch in principle is lower-surface, but may
be interparenchymatous for some part. Moreover, in places the larva
feeds from the palissade parenchyma. Seen from above the leaf appears
mottled. The overall result is that the mine, despite its considerable
size, is hard to find. The easiest way is to hold the leaves against
the light: the large larvae than are conspicuous. Frass in coarse
grains, both in the corridor and in the blotch; in the corridor
they are widely spaced. 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 Darvas, Skuhravá and Andersen
(2000), de Meijere (1926) 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 (Bladmineerders van Europa); posterior spiracles each with up to 40 bulbs on a black
conical projection (Spencer,
1976: 118, fig. 196).
Hosts in Great Britain & Ireland:
of year - mines: June-August.
of year - adults: Currently unknown.
in Great Britain & Ireland: Kent (New Cross), Surrey (Kew)
(Spencer, 1972b: 41), Warwickshire
(Coventry) (Robbins, 1991:
46) and Cambridgeshire (NBN
Distribution elsewhere: Widespread in continental Europe including Denmark, Germany,
Holland, Italy (Spencer, 1976:
118), Corsica, Czech Republic, French mainland, Lithuana, Poland,
Romania, Spanish mainland, Sweden and The Netherlands (Martinez
in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: