The genus Pleurinirmus ZLOT. has been erected monotypically. In this paper, 4 further species are added. Of these, the following 3 are described as new on the basis of Polish and Finnish material on: P. affectator n. sp. from Sylvia borin, P. phylloscopi n. sp. from Phylloscopus trochilus, and P. rarus n. sp. from Phylloscopus collybita.