ABSTRACT. Anopheles insulaeflorum (Swellengrebel de Graaf) as previously recognized, involves 2 species which can be differentiated by larval, pupal and male genitalia characters. Accordingly, the distribution of insulaeflorum is redefined and the second species, pilinotum n. sp., is described, illustrated and compared morphologically with insulaeflorum and other members of the aitkenii species complex.