The leaf and stem mines of British flies and other insects

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds


Napomyza bellidis Griffiths, 1967
[Diptera: Agromyzidae]

Napomyza bellidis Griffiths, 1967a. Proc. R. ent. Soc. Lond. (B) 36: 128
Napomyza bellidis Griffiths, 1967a; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 68, 112
Napomyza bellidis Griffiths, 1967a; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 274, 280 (fig. 1073), 281, 402.

Leaf-miner: Larvae feeding in basal leaves, mainly in mid-rib, moving from one leaf to another via the base of the leaves. Pupation internal (Spencer, 1972b: 68).

Most of the time the larva lives in the midrib of the rosette leaves. Now and then short excursions are made into the blade. At first they are pale green, later they are almost full depth and whitish, and quite conspicuous. They do not contain frass. The larva may migrate from one leaf to another by way of the heart of the rosette. For its development it needs 3-4 leaves. Pupation within the mine. Before that the larva has scraped clean the wall of the puparial chamber up to the cuticula. (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.

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 and Ireland:

Bellis perennis Daisy British Wild Flowers by John Somerville et al. Spencer, 1972b: 112

Hosts elsewhere:

Bellis       Spencer, 1990: 274
Bellis perennis Daisy British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - mines: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Hertfordshire (Barnet), probably more widespread (Spencer, 1972b: 68). East Suffolk (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Belgium (Scheirs, de Bruyn and von Tschirnhaus, 1999), Azores, Estonia, Finland, French mainland, Germany, Lithuania, Sweden and Ukraine (Fauna Europaea).

NBN Atlas links to known host species:

Bellis perennis

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.

External links: Search the internet:
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Atlas
NHM UK Checklist
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