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Sonobe, R. 1977a. Ant fauna of Miyagi Prefecture, Japan. Japanese Journal of Ecology 27:111-116.
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Soudek, S. 1921. K variabilite mravencu Leptothorax tuberum Nyl. Casopis Ceskoslovenské Spolecnosti Entomologické 18:1-5. PDF
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Soudek, S. 1927. Príspevek ku poznání moravskych mravencu. III. Casopis Moravského Zemského Musea v Brne 25:234-236.
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Soudek, S. 1922a. Príspevky k poznání moravskych mravencu. II. Sborník Klubu Prírodovedeckého v Brne 4:3-6.
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Soulié, J. 1967. Un nid de Camponotus (Orthonotomyrmex) vividus récolté en Basse Côte (Côte d'Ivoire) (Hymenoptera Formicoidea). Bulletin de la Société d'Histoire Naturelle de Toulouse 103:7-18.

Notes: Reprinted as Soulié (1973c).

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Snodgrass, R. E. 1910. The thorax of the Hymenoptera. Proceedings of the United States National Museum 39:37-91.
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Snodgrass, R. E. 1941. The male genitalia of Hymenoptera. Smithsonian Miscellaneous Collections 99(14):1-86.
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Snyder, T. E.; Graf, J. E.; Smith, M. R. 1961. William M. Mann. 1886-1960. Proceedings of the Entomological Society of Washington 63:68-73.
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Sonan, J. 1940. M. Yanagihara's collection from Daito-Islands, Okinawa: Hymenoptera. Transactions of the Natural History Society of Formosa 30:369-375. PDF

Notes: Formicidae p. 375.

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Smith, M. R. 1963b. Notes on the leaf-cutting ants, Atta spp., of the United States and Mexico (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 65:299-302. PDF
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