Checklist of British and Irish Hymenoptera - Sawflies, ' Symphyta' Author Liston, Andrew D. Author Knight, Guy T. Author Sheppard, David A. Author Broad, Gavin R. Author Livermore, Laurence text Biodiversity Data Journal 2014 2 1168 1168 http://dx.doi.org/10.3897/BDJ.2.e1168 journal article http://dx.doi.org/10.3897/BDJ.2.e1168 1314-2828--1168 3C3EC7B09BA145848E3E89CBBD28B432 3C3EC7B09BA145848E3E89CBBD28B432 Urocerus flavicornis (Fabricius, 1781) Sphex flavicornis Fabricius, 1781 Sirex bizonatus (Stephens, 1835, Sirex ) Distribution #England Notes Sirex bizonatus , collected 'near London', is a synonym of the Nearctic Urocerus flavicornis ( Schiff et al. 2012 ). Presumably an introduction, not known to be established in the British Isles.