Two new species of the millipede genus Gervais, 1847 from Laos (Diplopoda, Spirostreptida, Cambalopsidae).

Two new species of are described and illustrated from northern Laos. The epigean Likhitrakarn, Golovatch & Panha, is the second member of the -group to be found in that country and it seems to be especially similar to Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2007. However, it differs from the latter species by a row of several strong setae near the median marginal ridge on the paraprocts, combined with the gnathochilarium being considerably less densely setose on the caudal face, and the anterior gonopods showing a pair of smaller, apical, but larger lateral teeth on the coxosternal plate. Likhitrakarn, Golovatch & Panha, is the fourth member of the -group to be discovered in Laos, taken from a cave. It seems to be particularly similar to Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2007, but is distinguished by the more sparsely alveolate background fine structure of the metazonae, coupled with the gnathochilarium being considerably less densely setose on the caudal face, much stronger paramedian prongs and 4-segmented telopodites on ♂ coxae 1, the slightly longer and more slender apicoparamedian sternal projections on the anterior gonopods, and the much longer flagella of the posterior gonopods. An identification key to and a distribution map of species in Laos are also presented.