New records of the genus Eusterinx Förster (Hymenoptera: Ichneumonidae: Orthocentrinae) from the Afrotropical Region, with description of four new species from Central African Republic, South Africa and Uganda

The new species Eusterinx dzanga Humala & van Noort, sp. nov. from Central African Republic, Eusterinx kirkwoodi Humala & van Noort, sp. nov. and Eusterinx gamka van Noort & Humala, sp. nov. from South Africa, and Eusterinx kibale van Noort & Humala, sp. nov. from Uganda belonging to the subgenus Ischyracis are described and illustrated. An illustrated identification key to the known Afrotropical Eusterinx species is provided. Online Lucid identification keys and images of all the species treated herein are available at: http://www.waspweb.org.