Female: The head is mottled black and yellow and the thorax is black with a yellow pattern dorsally. Abdomen may be almost entirely black above but often with the midline of tergites 4 and 5 brownish and the apical tergite yellow. Occasionally the abdomen is almost entirely brown above. The stigma is brownish-yellow.
Male: The head is patterned with black and yellow and the abdomen is black with the midline of tergites 4 and 5 brown and brown lateral faces.
Pamphilius pallipes larvae feed in twist-like leaf rolls of birch leaves.
Size: Male: 7 - 11mm, Female: 8 - 12mm
Status: Uncommon, but widespread
Distribution: England, Scotland, Wales, Ireland
Flight period: May to June
Plant associations: Betula spp. (birches) (1) incl...
Betula pubescens (downy birch) (4)
Betula pendula (silver birch) (4)
Also rarely Alnus viridis (green alder) (3)
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
Schedl, W., 1976. Untersuchungen an Pflanzenwespen (Hymenoptera: Symphyta) in der subalpinen bis alpinen Stufe der zentralen ötztaler Alpen (Tirol, Österreich). Im Kommissionsverlag der Oesterreichischen Kommissionsbuchhandlung.
Viitasaari, M. ed., 2002. Sawflies (Hymenoptera, Symphyta), I: a review of the suborder, the Western Palaearctic taxa of Xyeloidea and Pamphilioidea. Tremex Press.