Two new species of the millipede genus Silvestri, 1923 from Cambodia (Diplopoda, Spirostreptida).

Two new species of are described from southern Cambodia. is clearly distinguished from all congeners by the shape of the telopodites of the posterior gonopods which are distinctly serrate laterally and by the anterior gonopods showing only a pair of single, smooth and curved coxosternal processes. sp. nov. is distinguished by having most crests on the collum being complete and male legs 1 showing long, prominent, one-segmented telopodites, coupled with the oblong-subtrapeziform, membranous, posterior gonopods with a small bifid process at about a third of the telopodite length. Notes on the variation of Mauriès, 1970 are also given, including a colour photograph of fresh, live material. A key to all four species of currently known to occur in Cambodia is also presented.