Phillips, J.H.H. 1965 Notes on species of Lecanium Burmeister (Homoptera: Coccoidea) in the Niagara Peninsula, Ontario with a description of a new species.. Canadian Entomologist 97: 231-238.

Notes: L. putmani n. sp.; notes on L. caryae, cerasifex, coryli, fletcheri, and persicae.