The Austro-Oriental planthopper genus Dictyomorpha Melichar, 1912 (Hemiptera: Fulgoroidea: Dictyopharidae) is revised to contain three previously described and four undescribed species: D. elongata Melichar, 1912 (Papua New Guinea, Indonesia); D. furca sp. nov. (China); D. hectica Haupt, 1926 (Philippines); D. laosensis sp. nov. (Laos); D. moluccana (Kirkaldy, 1913) (from Amboina Kirkaldy, 1913) comb. nov. (Indonesia); D. sulawesiensis sp. nov. (Indonesia); and D. unifasciata Liang, sp. nov. (Vietnam). The monotypic genus Amboina Kirkaldy, 1913 is synonymized with Dictyomorpha Melichar, 1912. Descriptions or redescriptions of Dictyomorpha and its included species are provided together with the dorsal habitus of the adults and nymphs and the structural illustrations. Fifth-instar nymph and wax glands of Dictyomorpha species are described for the first time. A diagnostic key is provided for differentiation of the known species in the genus. New data on the ultrastructural morphology of the antennal sensilla, rostral apex, and hind pretarsus of D. moluccana and the wax glands of the nymph of D. hectica are provided for the first time from the scanning electron microscope observations. Autapomorphies are proposed to support the monophyly of Dictyomorpha. A new genus Indodictyophara gen. nov., which is closely related to Dictyomorpha, also is established for a single new species, I. lobosa sp. nov., from southern India.