Theobald, F.V. 1907 Report on economic zoology for the year ending April 1st, 1907.. The Journal of the South-eastern Agricultural College, Wye, Kent No. 16: 178 pp.

Notes: Section on animals injurious to forest trees includes discussion on Cryptococcus fagi and Chermes corticalis; other species mentioned include Lepidosaphes ulmi, Lecanium persicae var. coryli, Orthezia insignis, Cryptococcus fagi, Chermes corticalis, Dactylopius longispinus and D. citri.