The subgenera Autoprotaetia Miksic, 1965, Gonoprotaetia Miksic, 1965 and Netociomima Miksic, 1963 of the genus Protaetia Burmeister, 1842 are revised and synonymized with Netociomima. All currently known representatives of Autoprotaetia and Gonoprotaetia are transferred to Netociomima and nomenclatorial changes are proposed. Described, illustrated and compared are 17 new species and 3 new subspecies. New taxa: Protaetia (Netociomima) baratana n. sp. (western Java), Protaetia (Netociomima) arapuroensis (eastern Java), Protaetia (Netociomima) hindu (Bali), Protaetia (Netociomima) detanii (Lombok), Protaetia (Netociomima) solorensis wetarica n. ssp. (Wetar Island), Protaetia (Netociomima) intermedia n. sp. (southern Sulawesi), Protaetia (Netociomima) minahassana n. sp. (southern Sulawesi), Protaetia (Netociomima) togiana n. sp. (Togian Archipelago), Protaetia (Netociomima) butona (Buton Island), Protaetia (Netociomima) wangiana n. sp. (Wangi Wangi Island), Protaetia (Netociomima) montreuili n. sp. (Sangir Island), Protaetia (Netociomima) ruteriana taliabuana n. ssp., (Taliabu Island), Protaetia (Netociomima) gigantea (Taliabu Island), Protaetia (Netociomima) pseudotacita n. sp. (Buru Island), Protaetia (Netociomima) taciturna saparuana n. ssp. (Spatura Island), Protaetia (Netociomima) garamensis (Gorom Island), Protaetia (Netociomima) waigeuensis (Waigeo Island), Protaetia (Netociomima) mehli n. sp. (Biak Island), Protaetia (Netociomima) wauensis (Papua New Guinea)