Abstract
Four new species within the genus Pseudoeupolyphaga are described and illustrated: Pseudoeupolyphaga duani Ren & Han, sp. nov., Pseudoeupolyphaga menglianensis Ren & Han, sp. nov., Pseudoeupolyphaga spelunca Ren & Han, sp. nov., and Pseudoeupolyphaga vestis Ren & Han, sp. nov. Morphological variants are recorded for the species Pseudoeupolyphaga pilosa. These findings further enhance the documented diversity and distribution patterns of Pseudoeupolyphaga in Southwest China.