Arnold, G. 1917. A monograph of the Formicidae of South Africa. Part III. Myrmicinae. Annals of the South African Museum 14:271-402. PDF

Arnold, G. 1920a. A monograph of the Formicidae of South Africa. Part IV. Myrmicinae. Annals of the South African Museum 14:403-578. PDF

Arnold, G. 1920b. [Untitled. Monomorium (Xeromyrmex) Salomonis L., stirps ocellatum (Arnold).]. P. 377 in: Santschi, F. 1920d. Formicides africains et américains nouveaux. Annales de la Société Entomologique de France 88:361-390. PDF

Arnold, G. 1922. A monograph of the Formicidae of South Africa. Part V. Myrmicinae. Annals of the South African Museum 14:579-674. PDF

Arnold, G. 1924. A monograph of the Formicidae of South Africa. Part VI. Camponotinae. Annals of the South African Museum 14:675-766. PDF

Arnold, G. 1926. A monograph of the Formicidae of South Africa. Appendix. Annals of the South African Museum 23:191-295. PDF

Arnold, G. 1944. New species of African Hymenoptera. No. 5. Occasional Papers of the National Museum of Southern Rhodesia 2:1-38. PDF

Arnold, G. 1946. New species of African Hymenoptera. No. 6. Occasional Papers of the National Museum of Southern Rhodesia 2:49-97. PDF

Arnold, G. 1947. New species of African Hymenoptera. No. 7. Occasional Papers of the National Museum of Southern Rhodesia 2:131-167. PDF

Arnold, G. 1948. New species of African Hymenoptera. No. 8. Occasional Papers of the National Museum of Southern Rhodesia 2:213-250. PDF

Arnold, G. 1949. New species of African Hymenoptera. No. 9. Occasional Papers of the National Museum of Southern Rhodesia 2:261-275. PDF

Arnold, G. 1951. The genus Hagensia Forel (Formicidae). Journal of the Entomological Society of Southern Africa 14:53-56. PDF

Arnold, G. 1952a. New species of African Hymenoptera. No. 10. Occasional Papers of the National Museum of Southern Rhodesia 2:460-493. PDF

Arnold, G. 1952b. The genus Terataner Emery (Formicidae). Journal of the Entomological Society of Southern Africa 15:129-131. PDF

Arnold, G. 1953. Notes on a female Dorylus (Anomma) Nigricans Ill. taken with workers. Journal of the Entomological Society of Southern Africa 16:141-142.

Arnold, G. 1954. New Formicidae from Kenya and Uganda. Annales du Musée Royal du Congo Belge. Nouvelle Série in Quarto. Sciences Zoologiques 1:291-295. PDF

Arnold, G. 1955. New species of African Hymenoptera. No. 11. Occasional Papers of the National Museum of Southern Rhodesia 2:733-762. PDF

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. 1960a. Aculeate Hymenoptera from the Drakensberg Mountains, Natal. Annals of the Natal Museum 15:79-87. 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

Aron, S.; Mardulyn, P.; Leniaud, L. 2016. Evolution of reproductive traits in Cataglyphis desert ants: mating frequency, queen number, and thelytoky. Behavioral Ecology and Sociobiology 70:1367-1379. [online early] 10.1007/s00265-016-2144-9 PDF

Aron, S.; Passera, L.; Keller, L. 1994. Queen-worker conflict over sex ratio: a comparison of primary and secondary sex ratios in the Argentine ant, Iridomyrmex humilis. Journal of Evolutionary Biology 7:403-418.

Aron, S.; Passera, L.; Keller, L. 1999. Evolution of social parasitism in ants: size of sexuals, sex ratio and mechanisms of caste determination. Proceedings of the Royal Society of London. Series B, Biological Sciences 266:173-177.

Aron, S.; Vargo, E. L.; Passera, L. 1995. Primary and secondary sex ratios in monogyne colonies of the fire ant. Animal Behavior 49:749-757.

Aronson, L. R.; Tobach, E.; Lehrman, D. S.; Rosenblatt, J. S. (eds.) 1970. Development and evolution of behavior. San Francisco: W. H. Freeman, xviii + 656 pp.

Arthofer, W.; Schlick-Steiner, B. C.; Steiner, F. M.; Konrad, H.; Espadaler, X.; Stauffer, C. 2005. Isolation of polymorphic microsatellite loci for the study of habitat fragmentation in the harvester ant Messor structor. Conservation Genetics 6:859-861. PDF

Asahina, S. , et al. (eds.) 1971. Entomological essays to commemorate the retirement of Professor K. Yasumatsu. Tokyo: Hokuryukan Publishing Co., vi + 389 pp.