First paper 22 pages, 6 colour photos, 7 line drawings. A taxonomic revision of the genus Acriopsis (6 species, 5 varieties). Revisions in Coelogyninae - a taxonomic revision of the genera Bracisepalum (2 species), Chelonistele (11 species, 4 varieties) Entomophobia (1 species), Geesinkorchis (2 species & Nabuluia (3 species). Includes synonymy, descriptions, distribution, habitat notes.