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Formica (F.) nigricans Emery, 1909 =Formica (F) pratensis var. nigricans Emery (Gallé 1979) Formica (F.) aquilonia Yarrow, 1955 Formica (F.) lugubris Zetterstedt, 1840 Formica (F.) rufa Linnaeus, 1761 Formica (F.) polyctena Foerster, 1850 =Formica rufa L. (Gallé and Gausz 1968) Formica (Coptoformica) exsecta Nylander, 1846 Formica (Coptoformica) pressilabris Nylander, 1846 =Formica exsecta Nyl. wax. pressilabris Nyl. (Somfai 1959) Polyergus rufescens (Latreille, 1798) Acknowledgment - This study was partly supported by the Hungarian National Scientific Research Fund (OTKA) No. T 020149. REFERENCES Andrásfalvy, A. (1961): Mitteilungen über Daten des Hochzeitfluges verschidener Ameisenarten in Ungarn und Ergebnisse von Versuchen der Koloniegründung im Formicas bei diesen Arten. -Insectes Soc., 8: 299-310. Baroni Urbani, C. (1971): Cataiogi della species di Formica dTtalia. - Mem. Soc. Entomol. Ital., 50: 5-287. Barrett, K. E. (1970): Ants from Hungary and Bulgaria. - The Entomologist, 103: 139-140. Fenyősiné — Hartner, A. (1994a): Adatok a Formica rufa csoport (Hymenoptera: Formicidae) fajainak nyugat-dunántúli elterjedéséhez. - EFE Tud. Közi. (in press). Fenyősiné — Hartner, A. (19946): Adatok a Formica rufa csoport (Hymenoptera: Formicidae) fajainak magyarországi elterjedéséhez. - Allait. Közi, 80: 57-64. Gallé, L. (1966a): Über die myrmecologische Verhältnisse bei Taktaköz. In: Beretzk et al.: Neue Beiträge zur Kenntniss der Tierwelt des oberen Tisza-Tales.-rúc/a, 2: 70-71. Gallé, L. (19666): Ecological and zoocoenological investigations of the Formicoidea fauna of the flood area of the river Tisza. - Tiscia, 2: 113-118. Gallé, L. (1967): Ecological and zoocoenological conditions of the Formicoidea fauna at Tiszakürt. - Tiscia, 3: 67-73. Gallé, L. (1969): Myrmecological investigations in the environs of Kisköre. - Tiscia, 5: 87-95. Gallé, L. (1972a): Study of ant populations in various grassland ecosystems. - Acta Biol. Szeged, 18: 159-164. Gallé, L. (19726): Formicidae populations of the ecosystems in the environs of Tiszafüred. Tiscia, 7: 59-68. Gallé, L. (1978): Dispersion of the nests of an ant species (Hymenoptera: Formicidae). -Acta Biol. Szeged, 24: 105-109. Gallé, L. (1979): Adatok a Bakony hegység hangya- (Hymenoptera: Formicoidea) faunájának ismeretéhez. - Veszprém Megyei Múzeumok Közleményei, 14: 239-244. Gallé, L. (1980): Dispersion of highdensity anty populations in sandy soil grassland ecosystems. - Acta Biol. Szeged, 26:129-135. Gallé, L. (1981): The Formicoid fauna of the Hortobágy. - In: Mahunka, S. (ed.): The Fauna of Hortobágy National Park, 307-311, Akadémiai Kiadó, Budapest.