Alam, S.M. 1957 The taxonomy of some British encyrtid parasites (Hymenoptera) on scale insects (Coccoidoidea).. Transactions of the Royal Entomological Society of London 109: 421-466.

Notes: Host species mentioned include Aspidiotus hederae, Asterolecanium variolosum, Chionaspis salicis, Diaspidiotus bavaricus, Eriococcus greeni, Eriopeltis festucae, Physokermes abietis, Pseudococcus newsteadi, Quadraspidiotus zonatus and Ripersia hibernica.