Amphigomphus nakamurai sp. n. (holotype S: Vietnam, Binh Phuh prov., Mt Tamdao, 30- -V-1993), Merogomphus tamdaoensis sp. n. (holotype S'. Vietnam, Binh Phuh prov., Mt. Tamdao, 19/24-V-1993), and Leptogomphus baolocensis sp. n. (holotype S: Vietnam, 15 km from Baoloc to Ho-chi-minh, Lamdong prov., 16-VI-1996) are described, illustrated and their affinities are pointed out. Material is deposited in the author's institution.