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 1314-2828-4-9042 Mesochorus errabundus Hartig, 1838 politus misident. Distribution England, Scotland Notes BMNH, added here; this species was treated as a synonym of politus Gravenhorst, 1829 by Schwenke (1999) but Horstmann (2003b) established errabundus as a distinct species. Using the characters given by Horstmann for distinguishing the two species, both occur here.