Nine diving water beetle species are described in the Desmopachria nitida species-group in the Neotropical genus Desmopachria Babington: D. gyration Miller, new species (Guyana), D. gingerae Miller, new species (Venezuela), D. curseenae Miller, new species (Suriname), D. lloydi Miller, new species (Bolivia), D. kemptonae Miller, new species (Venezuela), D. delongi Miller, new species (Suriname), D. vohrae Miller, new species (Venezuela), D. hardyae Miller, new species (Guyana), and D. singhae Miller, new species (Venezuela). The male genitalia of all species in the D. nitida species-group are illustrated except D. subtilis Sharp. The new species are illustrated from specimens, and described species are redrawn from published illustrations.