A large, fairly pale Pamphilid. The head is yellow with black markings. The female thorax is richly marked with yellow and the male less so. In both sexes, the venation is yellow in the stigma, basal part and the anterior margin of the forewing, with the rest of the venation being brown. The abdomen is yellow brown above with varying degrees of black on tergites 1 to 3 and apically.
Pamphilius histrio larvae feed singly in leaf rolls primarily on 3 to 5 metre high aspens and white poplar.
Size: Male: 10 - 13mm, Female: 11 - 14mm
Distribution: England, Scotland, Wales
Flight period: May to July
Plant associations: Populus spp. (poplars) incl...
Populus tremula (aspen) (1)
Populus alba (white poplar) (3)
1. Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
2. 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
3. Viitasaari, M. ed., 2002. Sawflies (Hymenoptera, Symphyta), I: a review of the suborder, the Western Palaearctic taxa of Xyeloidea and Pamphilioidea. Tremex Press.