Betrem, J.G. 1937 De morporphologie en systematiek van enkele vande vooraamste witte-luizensoorten van Java. [Morphology and systematics of some of the principal mealy bug species of Java. (Hom. Cocc.)]. Archief voor de Koffiecultuur in Nederlandsch-Indie 11: 1-118.

Notes: Discussion of mealybug anatomy and biology; keys to 6 scale insect subfamilies, 27 pseudococcine genera or species groups, and to 27 Pseudococcus species; 16 mealybugs in 6 genera described, 5 as new species.