Pristiphora albilabris - White-lipped Sawyer
Pristiphora carinata group
There are just five records (and only one in the last 30 years), from Scotland, Yorkshire and Staffordshire, since it was first noted in 1934 (Saunt 1936) (Musgrove, 2024).
The mesopleura is dulled by microsculpture. The labrum, pronotum, tegulae, coxae, femora and bases of tibiae are reddish-yellow. The female is best determined by the characteristics of the saw. The sawsheath is triangular when viewed from above. Males are best determined by the penis valve.
Pristiphora albilabris larvae feed on downy birch and may also feed on other birches.
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Size: 6.0 - 7.0mm
GB IUCN status: Data Deficient
GB rarity status: Nationally Rare
Distribution: England, Scotland
Flight period: May to July
Plant associations: Betula pubescens (downy birch)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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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, 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
Musgrove, A.J. 2024. A review of the status of sawflies of Great Britain - Phase 3: The Tenthredinidae (subfamily Nematinae). Natural England, unpublished
Prous, M., Kramp, K., Vikberg, V. and Liston, A., 2017. north-Western Palaearctic species of Pristiphora (hymenoptera, tenthredinidae). Journal of Hymenoptera Research, Vol. 59