Kaston, B.J. 1938 Checklist of elm insects.. Bulletin of the Connecticut Agricultural Experiment Station No. 408: 235-242.

Notes: Scales include Gossyparia spuria, Phenacoccus dearnessi, Lecanium caryae, L. corni, Chionaspis americana, Aspidiotus ancylus, A. ulmi and Lepidosaphes ulmi.