The legs are pale with a black stripe on the femora. Overall the female is a richly patterned, yellowish-brown insect. The head and thorax are straw coloured with black markings. The abdomen is black. The abdomen is black with pale lateral margins and apex. Venation straw coloured.
The male head is black and heavily punctured with a small yellow stripe behind the eye. The thorax and abdomen are also black and the venation is darker than in the female.
Although this species is rare, males are known to occur in numbers on occasion.
Pamphilius sylvarum larvae feed in leaf rolls on young oaks.
Size: 9 - 10mm
Distribution: England, Wales
Flight period: May to June
Plant associations: Quercus spp. especially Quercus robur (oaks, esp. pendunculate or English oak.)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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
Viitasaari, M. ed., 2002. Sawflies (Hymenoptera, Symphyta), I: a review of the suborder, the Western Palaearctic taxa of Xyeloidea and Pamphilioidea. Tremex Press.