Abstract
Specimens of Cybocephalus sp. were collected preying on Aspidiotus destructor (Signoret) infesting coconut trees (Dwarf cultivar) and on Diaspis echinocacti (Bouche) present on Opuntia ficus-indica Mill. and Nopalea cochenillifera (L.) Lyons (Cactaceae). In the later case the nitidulid was associated with another predator: Coccidophilus citricola (Brethes) (Coleoptera: Coccinellidae). The eggs were laid inside the scale of the diaspidid (one egg per scale); all life stages were detected. No sexual dimorphism was observed, and the natural sex ratio was 0.52 which represents a sexual proportion of 1.1 females : 1 male. Cybocephalus specimens were also collected preying on coccids on Alamanda cathartica L. (Apocynaceae) and on Morus alba L. (Moraceae).
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