Tanyxiphium longissimum Huber, syn. n. (Hymenoptera: Mymaridae) is synonymized under T. harriet (Zeya) based on examination of specimens from Hainan Island and Yunnan Province in the Oriental part of China, Sulawesi Island in Indonesia, Peninsular Malaysia, and Thailand. These are new country distribution records except for Thailand. The previously unknown male of T. harriet is described from Sulawesi Island, and the female is redescribed and illustrated based on non-type material examined.
An overview of the Oriental species of Cleruchus Enock (Hymenoptera: Mymaridae) is given, and its five newly described species as well as one undescribed species from Malaysia are keyed. The described new taxa are C. funiculatus Manickavasagam Palanivel sp. n., C. indicus Manickavasagam Palanivel sp. n. and C. orientalis Manickavasagam Palanivel sp. n., all from India, C. blimp Triapitsyn sp. n. from Brunei, and C. pmilb Triapitsyn sp. n. from Thailand. Anaphes quinquearticulatus Huber Triapitsyn is newly reported from India.
An overview of the Oriental species of the nominate subgenus of Camptopteroides Viggiani (Hymenoptera: Mymaridae) is given. Two new species, C. (Camptopteroides) formosa Manickavasagam Sankararaman sp. n. from India and C. (Camptopteroides) reducta Triapitsyn sp. n. from Thailand and Malaysia, are described, and C. formosa additionally compared to two unnamed species. The holotype male of the type species of this genus, C. armata Viggiani from Sri Lanka, is diagnosed and illustrated. A key to Old World species of Camptopteroides is provided.