The first report of subgenus Blacus Nees, 1819 (Hymenoptera, Braconidae, Brachistinae) from China

The subgenus Blacus Nees, 1819 (Hymenoptera, Braconidae, Brachistinae, Blacini, Blacus) is reported from China for the first time. Eight new species, B. (B.) adustiabdominus sp. nov., B. (B.) flavimaculus sp. nov., B. (B.) hebeiensis sp. nov., B. (B.) longicornis sp. nov., B. (B.) rufiabdominus sp. nov., B. (B.) rugifacialis sp. nov., B. (B.) tianmushanensis sp. nov., and B. (B.) xizangensis sp. nov., are proposed and seven species, B. (B.) exilis (Nees, 1811), B. (B.) forticornis Haeselbarth, 1973, B. (B.) leptostigma Ruthe, 1861, B. (B.) longipennis (Gravenhorst, 1807), B. (B.) paganus Haliday, 1835, B. (B.) pappianus Haeselbarth, 1973, and B. (B.) radialis Haeselbarth, 1973, are newly recorded from China. A key to the Chinese species of the subgenus Blacus is provided.