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 Mesochorus atriventris Cresson, 1872 sylvarum (Haliday, 1839, Cryptus ) synonymy by Horstmann (2006b) Distribution England, Scotland, Ireland, Isle of Man Notes some distribution data from Shaw (1993) , Horstmann (2006b)