Two species of the genus Chiloplectus are described from Ukraine. Detailed studies by light and scanning electron microscopy were made to differentiate between C. andrassyi, a new senior synonym of Plectus telekii, and C. loricatus. Some previously unknown characters like the shape of the excretory gland duct, the number and position of somatic setae, and the epiptygmata are introduced for this differentiation. C. loricatus is found to be a junior synonym of Plectus cancellatus, which is transferred to Chiloplectus. An emended diagnosis and a revised classi cation of Chiloplectus are proposed, and a key to the species of the genus is provided. Plectus globilabiatus Kirjanova, 1958 and P. annulatusMaggenti, 1961 are regarded as species inquirendae.