Gregg, R. E. 1947. Altitudinal indicators among the Formicidae. University of Colorado Studies. Physical and Biological Sciences 2:385-403.

Gregg, R. E. 1948. An unusual nest of the prairie mound-building ant (Hymenoptera, Formicidae). Proceedings of the Entomological Society of Washington 50:183-186.

Gregg, R. E. 1949a. A note on Pheidole (Macropheidole) rhea Wheeler (Hymenoptera: Formicidae). Psyche (Cambridge) 56:70-73. PDF

Gregg, R. E. 1949b. A new ant from southwestern United States (Hymenoptera, Formicidae). Proceedings of the Entomological Society of Washington 51:171-174. PDF

Gregg, R. E. 1950. A new species of Pheidole from the Southwest. Journal of the New York Entomological Society 58:89-93. PDF

Gregg, R. E. 1951. Two new species of exotic ants. Psyche (Cambridge) 58:77-84. PDF

Gregg, R. E. 1952a. A new ant of the genus Pheidole from Colorado. American Museum Novitates 1557:1-4. PDF

Gregg, R. E. 1952b. The female of Formica opaciventris Emery (Formicidae). Psyche (Cambridge) 59:13-19. PDF

Gregg, R. E. 1953a. Notes on the ant, Leptothorax obliquicanthus Cole (Hymenoptera: Formicidae). Breviora 22:1-4. PDF

Gregg, R. E. 1953b. The soldier caste of Pheidole (Ceratopheidole) clydei Gregg (Hymenoptera, Formicidae). American Museum Novitates 1637:1-7. PDF

Gregg, R. E. 1953c. Morphological considerations affecting the taxonomy of certain genera of ants (Hymenoptera, Formicidae). Proceedings of the Entomological Society of Washington 55:324-330. PDF

Gregg, R. E. 1954a ("1953"). Taxonomic notes on the ant, Camponotus cooperi Gregg. Psyche (Cambridge) 60:102-104. PDF

Gregg, R. E. 1954b. Geographical distribution of the genus Myrmoteras, including the description of a new species (Hymenoptera: Formicidae). Psyche (Cambridge) 61:20-30. PDF

Gregg, R. E. 1955a. A new species of ant belonging to the Pheidole pilifera complex (Hymenoptera: Formicidae). Psyche (Cambridge) 62:19-28. PDF

Gregg, R. E. 1955b. The rediscovery of Veromessor lobognathus (Andrews) (Hymenoptera: Formicidae). Psyche (Cambridge) 62:45-52.

Gregg, R. E. 1956. An extension of range for the ant, Pheidole lamia Wheeler (Hymenoptera: Formicidae). Entomological News 67:37-39.

Gregg, R. E. 1957 ("1956"). A new species of Myrmoteras from Ceylon (Hymenoptera: Formicidae). Psyche (Cambridge) 63:41-45. PDF

Gregg, R. E. 1958. Two new species of Metapone from Madagascar (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 60:111-121. PDF

Gregg, R. E. 1959 ("1958"). Key to the species of Pheidole (Hymenoptera: Formicidae) in the United States. Journal of the New York Entomological Society 66:7-48. PDF

Gregg, R. E. 1961. The status of certain myrmicine ants in western North America with a consideration of the genus Paramyrmica Cole (Hymenoptera: Formicidae). Journal of the New York Entomological Society 69:209-220. PDF

Gregg, R. E. 1963. The ants of Colorado, with reference to their ecology, taxonomy, and geographic distribution. Boulder: University of Colorado Press, xvi + 792 pp.

Gregg, R. E. 1964. Distribution of the ant genus Formica in the mountains of Colorado. Leaflet. University of Colorado Museum 13:59-69.

Gregg, R. E. 1969a. Geographic distribution of the ant genus Formica (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 71:38-49. PDF

Gregg, R. E. 1969b. New species of Pheidole from Pacific Coast islands (Hymenoptera: Formicidae). Entomological News 80:93-101. PDF

Gregg, R. E. 1972a. A new species of Stenamma (Hymenoptera: Formicidae) from Utah. Great Basin Naturalist 32:35-39. PDF

Gregg, R. E. 1972b. The northward distribution of ants in North America. Canadian Entomologist 104:1073-1091. PDF

Gregg, R. E. 1973. A new species of Camponotus (Hymenoptera: Formicidae) from Nevada. The Southwestern Naturalist 18:39-43. PDF

Gregg, R. E. 1974. William Steel Creighton - An appreciation. Journal of the New York Entomological Society 82:67-75.

Greiner, B.; Narendra, A.; Reid, S. F.; Dacke, M.; Ribi, W. A.; Zeil, J. 2007. Eye structure correlates with distinct foraging-bout timing in primitive ants. Current Biology 17:R879-R880. 10.1016/j.cub.2007.08.015 PDF

Notes: Myrmecia

Grey, G. 1841. Journals of two expeditions of discovery in north west and western Australia during the years 1837, 38 and 39. Volume 2. London: T. & W. Boone, 482 pp.