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Rice, H. M. A. 1947. Geology and mineral deposits of the Princeton map-area, British Columbia. Geological Survey of Canada. Memoirs 243:1-136.

Notes: Page 31: ants (Formicidae; not further identified), as fossils in Princeton sediments of Eocene or Oligocene age.

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Richards, O. W. 1956. Hymenoptera. Introduction and key to families. Handbooks for the Identification of British Insects 6(1):1-94.
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Richards, O. W. 1977. Hymenoptera. Introduction and key to families. Handbooks for the Identification of British Insects 6(1)(2nd edn.):1-100.
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Raqué, K.-F. 1994. Die Ameisenfauna der Sandhausener Dünen. Beihefte zu den Veröffentlichungen für Naturschutz und Landschaftspflege in Baden-Württemberg 80:241-254.

Notes: Not seen. Cited in Zoological Record, volume 132.

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Räsänen, V. 1915. Stridulationsapparate bei Ameisen besonders bei Formicidae. Acta Societatis pro Fauna et Flora Fennica 40(8):1-19.
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Rees, D. M.; Grundmann, A. W. 1940. A preliminary list of the ants of Utah. Bulletin of the University of Utah. Biological Series 31(5):3-12.
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Radchenko, A. G. 1995b. A key to species of Leptothorax (Hymenoptera, Formicidae) of the central and eastern Palearctic region. Entomological Review (Washington) 74(2):128-142.

Notes: English translation of Radchenko (1994e).

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Radchenko, A. G. 1995d. Taxonomic structure of the genus Myrmica (Hymenoptera, Formicidae) of Eurasia. Communication 1. Entomological Review (Washington) 74(3):91-106.

Notes: English translation of Radchenko (1994a).

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Radchenko, A. G. 1995e. A key to species of the genus Myrmica (Hymenoptera, Formicidae) of the central and eastern Palearctic region. Entomological Review (Washington) 74(3):154-169.

Notes: English translation of Radchenko (1994d).

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Radchenko, A. G. 1995f. A review of species of Myrmica belonging to the group of scabrinodus (Hymenoptera, Formicidae) from the central and eastern Palearctic. Entomological Review (Washington) 74(5):116-124.

Notes: English translation of Radchenko (1994f).

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Radchenko, A. G.; Tsyubik, M. M. 1990. On the discovery of a new member of the genus Plagiolepis Mayr (Hymenoptera, Formicidae) in the USSR. [Abstract.] [In Russian.]. Vestnik Zoologii 1990(1):85.

Notes: January-February issue. Date signed for printing ("podpisano k pechati"): 30 January 1990.

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Ramos, J. A. 1946. The insects of Mona Island (West Indies). Journal of Agriculture of the University of Puerto Rico 30:1-74. PDF
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Randuska, P. 1995. Formikofauna SPR Boky. Entomofauna Carpathica 7:20-26.
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