violiphaga (Hendel, 1932)
violiphaga Hendel, 1932. Fliegen palaearkt. Reg. 6(2):
Metopomyza violiphaga (Hendel, 1932); Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 50
Metopomyza violiphaga (Hendel, 1932); Spencer, 1976. Fauna
ent. Scand. 5 (1): 286-8
Galiomyza violiphaga (Hendel, 1932); Spencer, 1990. Host
specialization in the World Agromyzidae (Diptera) : 76 (fig.
279), 77, 92, 402.
Leaf-miner: Large, conspicuous, upper-surface, whitish blotch, preceded by a short, in the end generally overrun, corridor. Most frass in fine grains; part of it lies in a broad band in the mine, that ends near the point where the larva has left the mine for pupation. Exit slit in upper epidermis. Frequently several larvae in a common 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 de Meijere (1937)
and Hering (1957a). Posterior
spiracles each with 3 bulbs (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).
Orange; posterior spiracles each with 3 bulbs, one being distinctly
elongated (Spencer, 1976:
Hosts in Great Britain & Ireland:
of year - mines:
July-August (Hering, 1957).
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including
Kent, Surrey (VC17), Brecon and Perth (Spencer, 1972b); East Kent (NBN
recorded in the Republic of Ireland (Martinez in Fauna Europaea).
elsewhere: Widespread in western Europe including Austria, Denmark,
Norway, Sweden, Switzerland (Spencer,
1976: 288) and French mainland (Martinez in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: