Richards, W.R. 1958 Identities of species of Lecanium Burmeister in Canada (Homoptera: Coccoidea).. Canadian Entomologist 90: 305-313.

Notes: Describes females, some larval stages, and male "puparia" for species of Lecanium known to occur in Canada; follows Sulc 1932 on names with resurrection of a Fitch name, so not in accord with other North American usage.