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

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Liriomyza occipitalis Hendel, 1931
[Diptera: Agromyzidae]

Liriomyza occipitalis Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 235
Liriomyza bruscae Hering, 1962. Dt. ent. Z. (N.F.) 9(1-2): 42. [Synonymised by Spencer, 1976: 258]
Liriomyza bruscae Hering, 1962; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 51 (fig. 163), 54, 109. [Synonymised by Spencer, 1976: 258]
Liriomyza occipitalis Hendel, 1931; Spencer, 1976. Fauna ent. Scand. 5(1): 258-9, figs 456-7
Liriomyza occipitalis Hendel, 1931; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 5, 6, 7 (figs 8-9).

Leaf-mine: Larva mining the narrow branches, not the stem. Pupation external (Spencer, 1976: 259).

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.

Posterior spiracles unusually long, each with up to 14 bulbs (Spencer, 1976: 259).

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).

Brownish-black, black when parasitised (Spencer, 1976: 259).

Hosts in Great Britain & Ireland:

Equisetum arvense Field Horsetail British Wild Flowers by John Somerville et al. Spencer, 1972b: 109

Hosts elsewhere:

Equisetum arvense Field Horsetail British Wild Flowers by John Somerville et al. Spencer, 1990: 6

Time of year - mines: Currently unknown.

Time of year - adults: May.

Distribution in Great Britain & Ireland: Uncommon. Hertfordshire (Barnet) and London (Hampstead) (Spencer, 1972b: 54); Cambridgeshire and South-west Yorkshire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Finland, Germany, Russia (Leningrad area) (Spencer, 1976: 259), Czech Republic, French mainland, Poland and Slovakia (Martinez in Fauna Europaea).

NBN Atlas links to known host species:

Equisetum arvense

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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