Kannan, K.K. 1918 An instance of mutation: Coccus viridis, Green, a mutant from Pulvinaria psidii, Maskell.. Transactions of the Entomological Society of London (1918): 130-148.

Notes: Describes Coccus colemani n. sp.; discusses possibilities of the mutation suggested; other scale insects mentioned. Prior abstract in Asiatic Soc. Bengal Jour. and Proc. (n.s.) 13 (2): clxxxvi-clxxxvii.