Checklist of British and Irish Hymenoptera - Ichneumonidae Author Broad, Gavin R. text Biodiversity Data Journal 2016 4 9042 9042 http://dx.doi.org/10.3897/BDJ.4.e9042 journal article http://dx.doi.org/10.3897/BDJ.4.e9042 1314-2828--9042 Plectiscus ridibundus (Gravenhorst, 1829) Orthocentrus ridibundus Gravenhorst, 1829 exilis (Holmgren, 1858, Orthocentrus ) Distribution England, Scotland, Wales, Ireland