Swaine, J.M., & Hutchings, C.B. 1926 The more important shade tree insects of Eastern Canada and their control.. Bulletin (Dominion of Canada, Department of Agriculture) No. 63: 1-58.

Notes: Species discussed include Lepidosaphes ulmi, Aspidiotus perniciosus, Chionaspis pinifoliae, C. furfura, Physokermes piceae, Asterolecanium variolosum, Eulecanium nigrofasciatum, Pulvinaria vitis, Phenacoccus acericola, Gossyparia spuria, Chermes abietis and C. similis; brief field descriptions; description of damage; chemical control techniques.