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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Metallus lanceolatus (C. G. Thomson, 1870)
[Tenthredinidae]


Blennocampa lanceolata C. G. Thomson, 1870 [not 1871]
Metallus lanceolatus (C. G. Thomson, 1870) [not 1871]
Metallus geei Brischke, 1883. [Unavailable]
Entodecta gei (Brischke, 1883)
Fenusa gei Brischke, 1883
Metallus gei (Brischke, 1883)
Entodecta decolor Konow, 1886
Metallus gei var. egregius Zirngiebl, 1963
Metallus bensoni D. R. Smith, 1971.


Leaf miner: The mine begins with short, rather broad corridor, that often is overrun by the later, large, very transparent full depth blotch. The mine begins somewhere in the centre of the leaf. Frass in many loose grains (Bladmineerders van Europa).

The mine is also illustrated in British leafminers.

Larva: The larvae of sawflies have a head capsule, chewing mouthparts with opposable mandibles, six thoracic legs and abdominal legs (although they may be reduced) (see examples).

The pale larva is illustrated in British leafminers and Bladmineerders van Europa.

Pupa: The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.

Outside the mine (British leafminers).

Adult: The adult is illustrated in ECatSym - Electronic World Catalog of Symphyta.

Hosts in Great Britain & Ireland:

Rosaceae        
Geum       British leafminers
Geum aleppicum     Pitkin & Plant
Geum x `Borisii'     Pitkin & Plant
Geum urbanum Wood Avens British Wild Flowers by John Somerville et al. British leafminers

Hosts elsewhere:

Rosaceae        
Geum heldreichii     Bladmineerders van Europa
Geum macrophyllum Large-leaved Avens British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Geum rivale Water Avens British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Geum tirolense     Bladmineerders van Europa
Geum urbanum Wood Avens British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: Bivoltine: summer and early autumn (British leafminers).

Time of year - adults: Currently unknown.

Comments: Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta.

See (British Leafminers Newsletter) for a A Guide to the British Metallus species.

Distribution in Great Britain & Ireland: Local (British leafminers). Britain including North Wiltshire (NBN Atlas)

Distribution elsewhere: Widespread in continental Europe including Austria, Belgium, Bulgaria, Czech Republic, Estonia, Finland, French mainland, Germany, Hungary, Latvia, Poland, Romania, Russia - East, Slovakia, Sweden, and Ukraine. Also recorded in the Nearctic region (van Achterberg in Fauna Europaea).

NBN Atlas links to known host species:

Geum macrophyllum, Geum rivale, Geum urbanum

British and Irish Parasitoids in Britain and elsewhere: 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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Find images using Google


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Last updated 12-May-2017  Brian Pitkin Top of page