A review of the genus Apophysius Cushman (Ichneumonidae: Phygadeuontinae), with descriptions of six new species.

The phygadeuontine genus Apophysius (Ichneumonidae) is reviewed for the first time. Six new species are described, A. baolocensis Pham, Matsumoto Broad sp. nov., A. constrictus Pham, Matsumoto Broad sp. nov. and A. taynguyenensis Pham, Matsumoto Broad sp. nov. from the Central Highlands of Vietnam, A. latus Pham, Matsumoto, Konishi, Sheng Broad sp. nov. from China and Vietnam, A. takasukai Pham, Konishi Broad sp. nov. from the Cameron Highlands, Malaysia, and A. pentaceratops Broad sp. nov. from Sarawak, Malaysia. A key to the nine known species of the genus Apophysius is included.