McKenzie, H.L. 1962 Third taxonomic study of California mealybugs, including additional species from North and South America (Homoptera: Coccoidea: Pseudococcidae).. Hilgardia 32: 637-688.

Notes: Circaputo hirsutus, Paradoxococcus mcdanieli n. gen. and n. spp.; 14 additional new species in 6 genera; revised key to North American pseudococcid genera and to North American Dysmicoccus, Pseudococcus, and Rhizoecus species; critical notes on several previously described mealybugs.