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 pusio (Meigen, 1830)
[Diptera: Agromyzidae]


Agromyza pusio Meigen, 1830. Syst. Beschr. 6: 187
Liriomyza graminicola de Meijere, 1924. Tijdschr. Ent. 67: 141
Liriomyza breviseta Frey, 1946. Notul. ent. 26: 50. [Synonymised by Spencer, 1976: 266]
Liriomyza pusio (Meigen, 1830); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 48, 49 (fig. 157), 54, 122
Liriomyza pusio (Meigen, 1830); Spencer, 1976. Fauna ent. Scand. 5(1): 266-7, figs 475-6.


Leaf-mine: Upper-surface, unusually short corridor (ca. 4 cm). Sometimes several mines in a leaf. 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.

Posterior spiracles each with an ellipse of 8-9 bulbs (Spencer, 1976: 268).

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).

Brown (Bladmineerders van Europa). Posterior spiracles each with an ellipse of 8-9 bulbs (Spencer, 1972b: 54).

Hosts in Great Britain & Ireland:

Poaceae        
? Agrostis       Robbins, 1991: 140
Arrhenatherum       Robbins, 1991: 140
Arrhenatherum elatius False Oat-grass British Wild Flowers by John Somerville et al. Spencer, 1972b: 122
? Tragopogon pratensis Goat's-beard British Wild Flowers by John Somerville et al. Spencer, 1972b: 122
? Tragopogon pratensis Goat's-beard British Wild Flowers by John Somerville et al. Mines in BMNH
? Tragopogon pratensis Goat's-beard British Wild Flowers by John Somerville et al. Robbins, 1991

Comments: This seems an unlikely combination of host plants.

Hosts elsewhere:

Poaceae        
Arrhenatherum elatius False Oat-grass British Wild Flowers by John Somerville et al. Spencer, 1976: 267
Arrhenatherum elatius False Oat-grass British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - mines: July, October.

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Huntingdonshire (Woodwalton Fen and Monk's Wood), Devon (Dawlish, Paignton and Torquay) (Spencer, 1972b: 54), ? Warwickshire (Brandon and Packington) (Robbins, 1991: 140); Derbyshire, Monmouthshire, WSouth-west Yorkshire and West Suffolk (NBN Atlas).

Also recorded in the Republic of Ireland (Martinez, 200 in Fauna Europaea).

Distribution elsewhere: An uncommon species recorded from Netherlands, Austria and Germany (Spencer, 1976: 267), Belgium (Scheirs, de Bruyn and Verdyck, 1993), Czech Republic, Denmark, French mainland, Hungary, Italian mainland and Poland (Martinez, 200 in Fauna Europaea).

NBN Atlas links to known host species:

Arrhenatherum elatius, Tragopogon pratensis

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea   
Diglyphus isaea (Walker, 1838) Eulophidae: Eulophinae
Ichneumonoidea  
Chorebus dirona (Nixon, 1945) Braconidae: Alysiinae
Dacnusa maculipes Thomson, 1895 Braconidae: Alysiinae
Apodesmia posticatae (Fischer, 1957) Braconidae: Opiinae
Opius ambiguus Wesmael, 1835 Braconidae: Opiinae
Opius pallipes Wesmael, 1835 Braconidae: Opiinae
Phaedrotoma reptantis (Fischer, 1957) Braconidae: Opiinae


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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