Johnston, T.H. 1924 The Australian prickly-pear problem.. Report (Australian Association for the Advancement of Science) 16: 347-401.

Notes: Coccus (Dactylopius) indicus, Dactylopius cacti, D. confusus, D. confusus capensis, D. indicus, D. tomentosus, Diaspis echinocacti and Hemichionaspis minor are among the species discussed.