This species can be separated from the similar Phylloecus xanthostoma by its shining face with no punctures. By contrast P. xanthostoma has scattered punctures. P. linearis also has a pronounced interantennal furrow and a fourth antennal segment that is at least 0.75 times the length of segment 3. In P. xanthostoma the fourth antennal segment is at most 0.66 times the length of the third.
Larvae feed inside the stems of agrimony.
Distribution: England, Wales
Flight period: May to June
Plant associations: Agrimonia eupatoria (common agrimony)
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