Diprion pini (Linnaeus, 1758)

Diprion pini

The two Diprion species can only reliably be distinguished by the saw teeth and the penis valve since the external features of both are variable. Both species are yellowish with various degrees of black on the head, mesonotum mesosternum and tergites 3 to 6. Diprion pini females have saws with irregularly spaced and sized teeth. The penis valve is only shallowly sinuate on the serrated edge.

Larvae of the two species are easily recognisable and each feeds communally on pines.


Size: 7 - 10mm

Status: Local

Distribution: England, Scotland, Wales, Ireland

Flight period: May to July

Plant associations: Pinus spp. (pines)


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

Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168