Description of Nigeriella gen. nov. for N. fusciceps spec. nov. (typespecies; Nigeria, from Ficus abutilifolia Miq.) and N. letouzeyi spec. nov. (Cameroons, from Ficus cf. dekdeknena (Miq.) A. Rich.). Keys to species of Elisabethiella Grandi and Nigeriella, and to African genera of Agaonidae; differentiation of subfamilies Agaoninae and Blastophaginae.