Nematinus caledonicus - Caledonian Birch-cutter

Both males and females occur in Britain and Ireland. The basal tergites of the abdomen have regular transverse coriaceous sculpture. In both sexes, the frons bulge is deeply and broadly indented. The male's head, thorax and abdomen are mostly black dorsally. The female usually has a black mark on the middle lobe and lateral lobes of the mesonotum and an all black mesosternum. The sawsheath is acuminate in dorsal view. The lancet lacks any lateral teeth.

Nematinus caledonicus larvae feed on birches.

Jump to other species of Nematinus

Size: 6 - 7.5mm

Status: Uncommon

Distribution: England, Scotland, Ireland

Flight period: May to June

Plant associations: Betula spp. (birches)


Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London

Lindqvist, E. 1957. Zur Kenntnis der paläarktischen Nematinus-Arten (Hym., Tenthredinoidea). - Notulae Entomologicae, Helsingfors 37, 12-16

Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168.

Prous, M., Liston, A., Kramp, K., Savina, H., Vårdal, H. and Taeger, A., 2019. The West Palaearctic genera of Nematinae (Hymenoptera, Tenthredinidae). ZooKeys, 875, p.63.