The paper deals with Pheretima multitheca multitheca Chen, 1938 recorded from Vietnam (non Pheretima
multitheca Chen, 1938 now in Metaphire from Hainan Island). As a result, a new species, Amynthas erroneous
sp. n., is revealed from materials which were previously misidentified as Pheretima multitheca multitheca.
The new species is obviously distinguished from other Amynthas species by multiple spermathecal
pores lateroventral in intersegments 5/6/7/8/9, and presence of two pairs of crescentic genital markings
in xviii. In addition, another new species, Amynthas nhonmontis sp. n., is described and easily recognized
by multiple spermathecal pores ventral in intersegments 5/6/7/8 and three pairs of genital markings in
xvii, xix and xx.