De Lotto, G. 1974 On two genera of mealybugs (Homoptera: Coccoidea: Pseudococcidae).. Journal of the Entomological Society of Southern Africa 37: 109-115.

Notes: The composition of Hypogeococcus & Phenacoccus discussed, based on a few spp. described or recorded from S. Africa; key to species in Phenacoccus; P. proximus new sp.; new combs.; hosts; distribution.