McKenzie, H.L. 1961 Second taxonomic study of California mealybugs, with descriptions of new species (Homoptera: Coccoidea: Pseudococcidae).. Hilgardia 31: 15-52.

Notes: Describes 13 new species of mealybugs; additional California host and locality records for 9 species previously described; keys to U.S. Phenacoccus, Chorizococcus, Discococcus, Puto, and Rhizoecus.