obsessor obessor batis brunneosparsus schachti Checklist of British and Irish Hymenoptera - Ichneumonidae Broad, Gavin R. Biodiversity Data Journal 2016 4 9042 9042 3P9GH 1217937 Gravenhorst, 1829 Gravenhorst 1829 Insecta Ichneumonidae Ichneumon Animalia Ichneumon formosus Hymenoptera 0 9042 Arthropoda species formosus   obsessorWesmael, 1845  obessormisspelling  batisHolmgren, 1880  brunneosparsusStrobl, 1901  schachtiHeinrich, 1980  Distribution England, Scotland, Ireland  Notes Two subspecies, I. f. formosusand I. formosus microcephalusStephens, 1835, have been recorded from Britain ( Hilpert 1992).