Pamphilius sylvarum (Stephens, 1835)

Pamphilius sylvarum

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.

Larvae feed in leaf rolls on young oaks.

 

Size: 9 - 10mm

Status: Rare

Distribution: England, Wales

Flight period: May to June

Plant associations: Querecus spp. especially Quercus robur (oaks, esp. pendunculate or English oak.)

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

Viitasaari, M. ed., 2002. Sawflies (Hymenoptera, Symphyta), I: a review of the suborder, the Western Palaearctic taxa of Xyeloidea and Pamphilioidea. Tremex Press.