pascuum (Meigen, 1838)
pascuum Meigen, 1838. Syst. Beschr. 7: 402
Liriomyza pascuum (Meigen, 1838); Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 51 (figs 167-8), 54, 116
Liriomyza pascuum (Meigen, 1838); Spencer, 1990. Host
specialization in the World Agromyzidae (Diptera) : 147, 149
(fig 561), 155.
Leaf-mine: A conspicuous blotch, with characteristic greenish diffused frass,
several larvae frequently feeding together (Spencer, 1972b: 54).
upper-surface blotch without a trace of a preceding corridor, generally
containing several larvae. The mine contains much greenish and half-deliquescent
frass. Pupation outside the mine (Bladmineerders van Europa).
Forms an upper surface blotch mine. The mine can contain several larvae (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 de Meijere (1938) and illustrated 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).
Hosts in Great Britain & Ireland:
of year - mines: July-October.
of year - adults: Currently unknown.
in Great Britain & Ireland: Apparently widespread, at least
in the south including Kent, Surrey (VC17), Isle Of Wight (Spencer, 1972b: 54), Gloucestershire (Southam) (British
leafminers); East Gloucestershire (VC33), East Sussex (VC14), Herefordshire (VC36),
Monmouthshire (VC35), Shropshire (VC40), South Devon (VC3), Staffordshire (VC39), Surrey (VC17), West Gloucestershire (VC34), West Sussex (VC13) and Worcestershire (VC37) (NBN
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe including Luxembourg (Bladmineerders van Europa), Belgium (de
Bruyn and von Tschirnhaus, 1991), Corsica, French mainland,
Germany, Poland, Romania and Spanish mainland (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: