Ptiliidae collected in Africa (Angola, Botswana, Namibia, South Africa) 28 December 1971 – 20 April 1972 by members of a Natural History Museum, London, expedition to south western Africa are determined to 27 species, 15 of which are new to science: Actidium bipustulatum
sp. n., Actidium parvum sp. n., Bambara chianga sp. n., Bambara magnifica sp. n., Bambara namibiensis sp. n., Bambara gabela sp. n., Bambara subjoannis sp. n., Ptiliola minutissima sp. n., Ptiliola flava sp. n., Ptiliola problematica
sp. n., Ptiliola semitaria sp. n., Ptilium exiguum sp. n., Ptilium pernix sp. n., Nephanes plurijugosus sp. n., Acrotrichis botswanensis sp. n. Information about collecting methods and sites is provided from data kept at the time and figures included
to amplify the descriptions of earlier authors. Keys are provided to the subfamilies, tribes and genera.