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


Pseudorchestes pratensis (Germar, 1821)
[Coleoptera : Curculionidae]

Salius pratensis Germar, 1821
Orchestes tomentosus
Gyllenhal, 1835
Orchestes waltoni
Curtis, 1838
Rhynchaenus pratensis
(Germar, 1821)
Pseudorchestes pratensis
(Germar, 1821).

Leaf-miner: The larva makes a small full depth blotch, usually in the leaf tip. Frass concentrated in the centre of the mine (Bladmineerders van Europa).

Larva: The larvae of beetles have a head capsule and chewing mouthparts with opposable mandibles and lack abdominal legs (see examples).

The larva, when full grown, makes a globular cocoon in that same centre and pupates there (Bladmineerders van Europa).

Pseudorchestes pratensis
Larva of Pseudorchestes pratensis on Centaurea scabiosa
Image Chris Snyers (Bladmineerders van Europa)


Pupa: The pupae of beetles have visible head appendages, wings and legs which lie in sheaths (see examples).

Hosts in Great Britain and Ireland:

Centaurea nigra Common Knapweed British Wild Flowers by John Somerville et al. Pitkin & Plant

Hosts elsewhere:

Centaurea jacea Brown Knapweed   Bladmineerders van Europa
Centaurea scabiosa Greater Knapweed British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Widespread in Britain including Bedfordshire, Cambridgeshire, Denbighshire, East Kent, East Norfolk, East Suffolk, East Sussex, Huntingdonshire, Leicestershire, Northamptonshire, Oxfordshire, Shropshire, Warwickshire, West Kent and West Suffolk (NBN Atlas).

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

Distribution elsewhere: Widespread in continental Europe including Austria, Bulgaria, French mainland, Germany, Greek mainland, Hungary, Italian mainland, Moldova, Poland, Romania, Russia - East, Sicily, Slovakia, Switzerland, Ukraine and Yugoslavia. Also recorded in the Oriental region (Fauna Europaea).

NBN Atlas links to known host species:

Centaurea jacea, Centaurea nigra, Centaurea scabiosa

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, as Salius pratensis
Fauna Europaea
NBN Atlas
NHM UK Checklist

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