The mealybug,Phenacoccus herreniCox&Williams, is a pest of cassava in Colombia, South America. Six species of coccinellid beetles that are predaceous on this mealybug were studied in the laboratory:Cleothera notata, Cleothera onerata, Cleotherasp.,Hyperaspissp. 1,H.sp. 2, andH. sp. 3. Comparisons were made of adult coloration, sites of oviposition and pupation, larval feeding behavior and wax production, developmental times, sex ratios, and potential for use in biological control programs in South America and Africa.