Checklist of British and Irish Hymenoptera - Chalcidoidea and Mymarommatoidea Author Dale-Skey, Natalie Author Askew, Richard R. Author Noyes, John S. Author Livermore, Laurence Author Broad, Gavin R. text Biodiversity Data Journal 2016 4 8013 8013 http://dx.doi.org/10.3897/BDJ.4.e8013 journal article http://dx.doi.org/10.3897/BDJ.4.e8013 1314-2828--8013 Megastigmus atedius Walker, 1851 piceae Rohwer, 1915 zwoelferi Schefer-Immel, 1957 Distribution England Notes Accidental introduction from North America and apparently established, developing in seeds of Pinus and Picea conifers ( Roques and Skrzypczynska 2003 ).