Gillette, C.P., & List, G.M. 1923 Notes on insect and mite pests.. Circular 38. Thirteenth annual report of the State Entomologies. Office of the State Entomol. Colo. Agric. College Fort Collins, Colorado

Notes: Brief notes on Pulvinaria vitis, Aspidiotus perniciosus, A. howardi, A. ancylus, Lepidosaphes ulmi, Gossyparia spuria, Lecanium comi, Aspidiotus aesculi and Lecaniodiaspis pruinosa.