Pristiphora subarctica (Forsslund, 1936)

Pristiphora subarctica - Pristiphora pallida group

The sawsheath is bulbous basally, tapering to the apex. The femur is yellow or infuscated on the underside. In the males, the underthorax has at least the mesepimeron infuscate. Males can be distinguished by the penis valves.

Larvae feed on Norway spruce.

 

Size: Female: 5.0 - 6.0mm, male: 4.0 - 5.0mm

Status: Scarce

Distribution: England

Flight period: Assumed April to May

Plant associations: Picea abies (Norway spruce)

References:

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.D., 1981. Pristiphora (Lygaeophora) lanifica (Zaddach, 1882) new to Britain (Hymenoptera: Tenthredinidae). Entomologist's gazette.

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

Prous, M., Kramp, K., Vikberg, V. and Liston, A., 2017. north-Western Palaearctic species of Pristiphora (hymenoptera, tenthredinidae). Journal of Hymenoptera Research, Vol. 59