Some aspects of the biology of four West African capsid pests of Cocoa,Distantiella theobroma(Distant),Sahlbergella singularisHaglund,Bryocoropsis laticollisSchumacher andHelopeltis corbisieriSchmitz (Miridae: Heteroptera) are briefly summarized. Their immature stages are described and sketched in detail. Keys to distinguish all the larval stages are given and the techniques for rearing them reviewed. The systematics of Bryocorinae is discussed.