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Ronchetti, G. 1963. Il gruppo Formica rufa in Lombardia (Italia settentrionale). Symposia Genetica et Biologica Italica 12:200-213.
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Ronchetti, G. 1966. Le formiche del gruppo Formica rufa sulle Alpi orientali italiane. Bollettino della Società Entomologica Italiana 96:123-137. PDF
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Ronchetti, G. 1980. Distribution des fourmis du groupe Formica rufa en Europe (5 cartes). Deuxième édition. Pavia: Istituto di Entomologia dell'Università di Pavia, 5 maps.
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Rohlfien, K. 1979. Aus der Geschichte der entomologischen Sammlungen des ehemaligen Deutschen Entomologischen Instituts. III. Die Hymenopterensammlung. Beiträge zur Entomologie 29:415-438.

Notes: Collection has 162 genera and 1360 species of Formicidae, 190 of the latter with types.

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de Romand, B. E. 1846. Notice sur un insecte nouveau. Annales de la Société Entomologique de France (Bull.) (2)4:xxxii.
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Roger, J. 1863b. Verzeichniss der Formiciden-Gattungen und Arten. Berliner Entomologische Zeitschrift 7(Beilage):1-65. PDF
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Rohe, W.; Heller, G. 1990a. Vorläufige Ameisenliste (Formiciden) mit Kurzkommentar für Rheinhessen, die Pfalz und den Naheraum. Fauna und Flora in Rheinland-Pfalz 5(4):803-818.

Notes: Not seen. Cited in Rohe & Heller (1990b).

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Roger, J. 1862c. Synonymische Bemerkungen. 1. Ueber Formiciden. Berliner Entomologische Zeitschrift 6:283-297. PDF
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Roger, J. 1861a. Die Ponera-artigen Ameisen (Schluss). Berliner Entomologische Zeitschrift 5:1-54. PDF
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Roger, J. 1861b. Myrmicologische Nachlese. Berliner Entomologische Zeitschrift 5:163-174. PDF
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Roger, J. 1862a. Einige neue exotische Ameisen-Gattungen und Arten. Berliner Entomologische Zeitschrift 6:233-254. PDF
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Roger, J. 1862b. Beiträge zur Kenntniss der Ameisenfauna der Mittelmeerländer. II. Berliner Entomologische Zeitschrift 6:255-262. PDF
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Roger, J. 1860. Die Ponera-artigen Ameisen. Berliner Entomologische Zeitschrift 4:278-312. PDF
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Roger, J. 1857. Einiges über Ameisen. Berliner Entomologische Zeitschrift 1:10-20. PDF
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Roger, J. 1859. Beiträge zur Kenntniss der Ameisenfauna der Mittelmeerländer. I. Berliner Entomologische Zeitschrift 3:225-259. PDF
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Rodriguez, A. 1982 ("1981"). Contribución al conocimiento de las hormigas (Hymenoptera, Formicidae) de Sierra Morena Central. Boletín de la Asociación Española de Entomologia 5:181-188.
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