The head and the abdomen are dark. The tergites have pale apical margins. The thorax is polished without punctures. The stigma is dark and the legs have black femora, white tibiae (apically brown) and brown tarsi. The antennae are shorter than P. pubescens and segment 3 is clearly longer than segments 7 and 8 combined.
Periclista lineolata larvae feed on sessile and English oak. This species has the branched bristles dorsally with the branches about the same length as the stems. The head is also dark.
Size: 6 - 7mm
Distribution: England, Scotland
Flight period: April to May
Plant associations: Quercus petraea and Quercus robur (sessile and English oak)
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
Lorenz, H. and Kraus, M., 1957. Die Larvalsystematik der Blattwespen (Tenthredinoidea und Megalodontoidea) aus dem Zoologischen Inst. Univ. Erlangen. Abh. Larvalsyst. Ins, (1).