Arnold, G. 1956. New species of African Hymenoptera. No. 12. Occasional Papers of the National Museum of Southern Rhodesia. B. Natural Sciences 3:52-77. PDF

Arnold, G. 1958. New species of African Hymenoptera. No. 13. Occasional Papers of the National Museum of Southern Rhodesia. B. Natural Sciences 3:119-143. PDF

Arnold, G. 1959. New species of African Hymenoptera. No. 14. Occasional Papers of the National Museum of Southern Rhodesia. B. Natural Sciences 3:316-339. PDF

Arnold, G. 1960b. New species of African Hymenoptera. No. 15. Occasional Papers of the National Museum of Southern Rhodesia. B. Natural Sciences 3:452-488. PDF

Arnold, G. 1962. New species of African Hymenoptera. No. 16. Occasional Papers of the National Museum of Southern Rhodesia. B. Natural Sciences 3:844-855. PDF