The genera Nemadiopsis Jeannel, 1936 and Falkonemadus Szymczakowski, 1961 are redescribed and revised. The taxonomic position of Nemadiopsis and Falkonemadus is analy sed using features of male and female genitalia. Two new subgenera, Nemadiopsicus subgen. n. and Nemadiopsella subgen. n. and five new species, Nemadiopsis (Nemadiopsis) grossicornis sp. n., N. (Nemadiopsicus) rotundatus sp. n., N. (Nemadiopsella) curvipes sp. n., Falkonemadus similaris sp. n. and F. avicularis sp. n. are described. Keys to the subgenera and species are given. Nemadiopsis (Nemadiopsis) edwardsi Jeannel, 1936 and N. (N.) irretusus Szymczakowski, 1962 are proposed as junior subjective synonyms of Nemadiopsis (N.) fastidiosus (Fairmaire et Germain, 1859).