Mackie, D.B. 1931 A report of the coccids infesting avocados in California with special reference to Chrysomphalus dictyospermi (Morg.). Bulletin of the California Department of Agriculture 20: 419-441.

Notes: Reports survey results on 13 scale insects; detailed discussion, including full host lists for Chrysomphalus dictyospermi, Aspidiotus lataniae.