Harrison, J.W.H. 1916 Coccidae and Aleyrodidae in Northumberland, Durham, and north-east Yorkshire.. The Entomologist 49: 172-174.

Notes: Species mentioned include Aspidiotus britannicus, Chionaspis salicis, Eriopeltis festucae, Asterolecanium variolosum, Lecanium ciliatum, Physokermes abietis, Dactylopius hibernicus, Eriococcus devoniensis, Fonscolombia fraxini, Ortheziola vejdovskyi, Orthezia cataphracta, Orthezia urticae, and Newsteadia floccosa; ecological notes.