Quiroz-Robledo, L. N.; Valenzuela-González, J.; Alemán-Castrejón, G. 2004. Pseudomyrmecine ants (Hymenoptera: Formicidae) from the state of Morelos, Mexico. Sociobiology 43:233-253.

Mackay, W. P.; MacKay, E. E. 2004. A new species of the ant genus Leptogenys (Hymenoptera: Formicidae) with inflated mandibles. Sociobiology 43:255-258.

Mackay, W. P.; Mackay, M. A.; MacKay, E. E. 2004. An unusual new carpenter ant of the genus Camponotus (Hymenoptera: Formicidae) from Nicaragua. Sociobiology 43:459-465. PDF

Wetterer, J. K.; Espadaler, X.; Wetterer, A. L.; Cabral, S. G. M. 2004. Native and exotic ants of the Azores (Hymenoptera: Formicidae). Sociobiology 44:1-20.

Mayhé-Nunes, A. J.; Brandão, C. R. F. 2005. Revisionary studies on the attine ant genus Trachymyrmex Forel. Part 2: the Iheringi group (Hymenoptera: Formicidae). Sociobiology 45:271-305. PDF

Miyazaki, S.; Murakami, T.; Azuma, N.; Higashi, S.; Miura, T. 2005. Morphological differences among three female castes: worker, queen and intermorphic queen in the ant Myrmecina nipponica (Formicidae : Myrmicinae). Sociobiology 46:363-374.

Steiner, F. M.; Schlick-Steiner, B. C.; Moder, K.; Bruckner, A.; Christian, E. 2005. Congruence of data from different trapping periods of ant pitfall catches (Hymenoptera: Formicidae). Sociobiology 46:105-116. PDF

Bution, M. L.; Caetano, F. H. 2005. Comparative study of the histology, histochemistry and ultramorphology of the proventriculus in the Cephalotini tribe (Hymenoptera: Formicidae). Sociobiology 46:185-193.

Roma, G. C.; Bueno, O. C.; Camargo Mathias, M. I. 2005. Comparative study of the fat body in some genera of the Attini tribe (Hymenoptera: Formicidae). Sociobiology 45:449-462. PDF

Nunes, P. H.; Camargo-Mathias, M. I. 2005. Study of the venom glands in Ectatomma quadridens (Hymenoptera: Formicidae). Evolutionary hypothesis in subfamily Ponerinae. Sociobiology 45:949-966. PDF

Eguchi, K.; Bui, T. V. 2005. A new South Vietnamese species of the genus Pheidole with a truncated head in the major and queen (Insecta, Hymenoptera, Formicidae). Sociobiology 45:721-730. PDF

Tinaut, A.; Ruano, F.; Martínez, M. D. 2005. Biology, distribution and taxonomic status of the parasitic ants of the Iberian Peninsula (Hymenoptera: Formicidae, Myrmicinae). Sociobiology 46:449-489. PDF

von Aesch, L.; Cherix, D. 2005. Introduced ant species and mechanisms of competition on Floreana Island (Galápagos, Ecuador) (Hymenoptera: Formicidae). Sociobiology 45:463-481. PDF

Wetterer, J. K. 2005. Worldwide distribution and potential spread of the long-legged ant, Anoplolepis gracilipes (Hymenoptera: Formicidae). Sociobiology 45:77-97. PDF

Johnson, T.; Mackay, W.; Pacheco, J.; Negrete-Yankelevich, S.; Gove, A. D. 2006. The rediscovery of the ant Temnothorax striatulus. Sociobiology 28:837-840.

Eguchi, K.; Bui, T. V. 2006. Cladomyrma scopulosa new species from Vietnam. Sociobiology 47:305-314.

Clark, W. H.; Blom, P. E. 2007. Annotated checklist of the ants on the Idaho National Laboratory (Hymenoptera: Formicidae). Sociobiology 49(2):1-117.

Eguchi, K.; Yamane, S.; Zhou, S.-Y. 2007. Taxonomic revision of the Pheidole rinae Emery complex. Sociobiology 50:257-284.

Pacheco, J.; Herrera, H. W.; MacKay, W. 2007. A new species of Thief Ant of the genus Solenopsis from the Galapagos Islands (Hymenoptera: Formicidae). Sociobiology 50:1075-1086. PDF

Ma, L.-B.; Xu, S.-Q.; Makio, T.; DuBois, M. 2007. A new species of the genus Stenamma (Hymenoptera: Formicidae) from China. Sociobiology 50:371-377. PDF

Wetterer, J. K.; Espadaler, X.; Wetterer, A. L.; Aguin-Pombo, D.; Franquinho-Aguiar, A. M. 2007. Ants (Hymenoptera: Formicidae) of the Madeiran archipelago. Sociobiology 49 (3):265-297. PDF

Bharti, H. 2008. Altitudinal diversity of ants in Himalayan regions (Hymenoptera: Formicidae). Sociobiology 52:305-322. PDF

Zhou, S.; Huang, J.; Ma, L. 2008. Two new species of the ant genus Myrmecina (Hymenoptera: Formicidae), with a key to Chinese species. Sociobiology 52:283-291. PDF

Solis, D. R.; Caetano, F. H.; Yabuki, A. T.; Moretti, T. C.; Bueno, O. C. 2009. Ultramorphology of the digestive tract of Paratrechina longicornis (Hymenoptera, Formicidae). Sociobiology 53:51-59. PDF

Solis, D. R.; Fox, E. G. P.; Rossi, M. L.; Bueno, O. C. 2009. Description of the immatures of workers of the weaver ant, Camponotus textor (Hymenoptera: Formicidae). Sociobiology 54:541-559. PDF

Castaño-Meneses, G.; Benrey, B.; Vargas, J. G. P. 2009. Diversity and temporal variation of ants (Hymenoptera: Formicidae) from malaise traps in a tropical deciduous forest. Sociobiology 54:633-645. PDF

Vieira, A. S.; Antonialli-Junior, W. F.; Fernandes, W. D.; Tofolo, V. C.; Giannotti, E. 2009. Description of the immature and adult stages of Ectatomma vizottoi (Formicidae: Ectatomminae). Sociobiology 53 (1):27-38. PDF

Mackay, W. P.; Delsinne, T. 2009. A new species of carpenter ant (Hymenoptera: Formicidae: Camponotus) from Paraguay with a key to the New World members of the maculatus species complex. Sociobiology 53:487-498. PDF

Wetterer, J. K. 2009a. Worldwide spread of the penny ant, Tetramorium bicarinatum (Hymenoptera: Formicidae). Sociobiology 54:1-20. PDF

Del Toro, I.; Pacheco, J. A.; MacKay, W. P. 2009. Revision of the ant genus Liometopum (Hymenoptera: Formicidae). Sociobiology 53:299-369. PDF