The following new taxa are described: Michaelapion sugonyaevi gen. et sp. n. from northern Vietnam and northern India (Apionidae, Aspidapiini), Demimaea eugenii sp. n. from Vietnam (Curculionidae: Curculioninae), Hainokisaruzo eugenii sp. n., H. armipes sp. n., H. rufus sp. n., H. femoratus sp. n., H. pallens sp. n., H. orlovi sp. n., and H. sergii sp. n. from northern Vietnam, and H. gressitti sp. n. from Taiwan (Curculionidae: Ceutorhynchinae). A key to 6 species of Hainokisaruzo from Vietnam is given. A new subgenus Memecyderes subgen. n. is erected in Mecysmoderes Schoenherr with the type species Mecysmoderes eugenii sp. n. widely distributed in Southeastern Asia; it also includes the very close M. simulator sp. n. with a similar range but also occurring in South-Western China, and M. memecylonis Marshall from India and Nepal (new record).