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


Profenusa thomsoni (Konow, 1886)
[Hymenoptera: Tenthredinidae]

Fenusa thomsoni Konow, 1886.
Emphytus pumilio
Hartig, 1837. [Unavailable]
Fenusa pumilio Hartig, 1837. [Unavailable]
Fenusa pumilio C. G. Thomson, 1871. [Unavailable]
Fenusa pumilio Konow, 1886. [Unavailable]
Fenusella thomsoni (Konow, 1886)
Profenusa alumna (MacGillivray, 1923). [Unavailable]
Profenusa thomsoni (Konow, 1886).

Leaf miner: Blotch, starting in the centre of the leaf. An ill-defined accumulation of frass in its first part. The blotch develops with little consideration of the major veins. Several mines may occur in a leaf, and coalesce into one large blister (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 larva has short feet and dark markings on the prosternum and two spots on the meso- and meta-sternum (British leafminers). The larva is also illustrated in (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: Details unknown.

Hosts in Great Britain and Ireland:

Betula       British leafminers

Hosts elsewhere:

Betula lutea     Bladmineerders van Europa
Betula papyrifera Paper birch   Bladmineerders van Europa
Betula pendula Silver Birch British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Betula populifolia     Bladmineerders van Europa
Betula pubescens Downy Birch British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: Late summer (British leafminers).

Time of year - adults: Currently unknown.

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

Distribution in Great Britain and Ireland: Hants (Fleet) (British leafminers); West Suffolk (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Bulgaria, Czech Republic, Estonia, Finland, French mainland, Germany, Italian mainland, Poland, Romania, Russia - Central, Sweden and The Netherlands
(Fauna Europaea).

Also recorded in the Nearctic Region (Fauna Europaea).

NBN Atlas links to known host species:

Betula papyrifera, Betula pendula, Betula pubescens

British and Irish Parasitoids in Britain and elsewhere:

Chrysocharis purpurea Bukowski, 1938 Eulophidae: Entedoninae
Chrysocharis eurynota Graham, 1963 Eulophidae: Entedoninae
Ichneumonoidea - Links to species no longer available  
Lathrolestes luteolator (Gravenhorst, 1829) Ichneumonidae: Euryproctinae
Lathrolestes nigricollis (Thomson, 1883) Ichneumonidae: Euryproctinae
Lathrolestes soperi Reshchikov, 2010 Ichneumonidae: Euryproctinae
Grypocentrus albipes Ruthe, 1855 Ichneumonidae: Tryphoniinae

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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Last updated 18-Oct-2019  Brian Pitkin Top of page