In the Canadian Entomologist, Vol. xxxiv, page 232 (1902), I gave the reasons for adopting hesperidum as the type of Coccus, which adoption caused such radical changes in the classification of the Cocciœ that I am free to say I hesitated to make them in my Catalogue of the Coccidæ of the World, published in 1903. The main difficulty was to give a proper interpretation to the action of Geoffroy, in his Histoire Abrégée des Insectes, Vol. I (1762), where he removed a part fo the Linnæan species from Coccus, and placed them in the genus Chermes, thus using this genus in a different sense from that of Linnæus, the original founder, and placing adonidum, phalaridis was given by Linnæus under the gensu Coccus, in his Systema Naturæ, ed. x (1758), and no one has ever been able to positively identify this insect.