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| Formica albipennis  Fabricius, 1793 | 0 | 
| Formica albo-fasciata  Smith, 1862 | 0 | 
| Formica altipetens  Wheeler, 1913 | 0 | 
| Formica archboldi  Smith, 1944 | 0 | 
| Formica argentea  Wheeler, 1912 | 0 | 
| Formica bidens  Linnaeus | 0 | 
| Formica bimaculata  Smith, 1858 | 0 | 
| Formica biophilica  Trager et al., 2007 | 0 | 
| Formica browni  Francoeur, 1973 | 0 | 
| Formica calviceps  Cole, 1954 | 0 | 
| Formica corusca  Smith, 1862 | 0 | 
| Formica densiventris  Viereck, 1903 | 0 | 
| Formica dolosa  Buren, 1944 | 0 | 
| Formica esuriens  Smith, 1858 | 0 | 
| Formica exsectoides  Forel, 1886 | 0 | 
| Formica foreliana  Wheeler, 1913 | 0 | 
| Formica francoeuri  Bolton, 1995 | 0 | 
| Formica fusca  Linnaeus, 1758 | 1 | 
| Formica gnava  Buckley, 1866 | 0 | 
| Formica hewitti  Wheeler, 1917 | 0 | 
| Formica incisa  Smith, 1858 | 0 | 
| Formica integra  Nylander, 1856 | 0 | 
| Formica integroides  Wheeler, 1913 | 0 | 
| Formica lasioides  Emery, 1893 | 0 | 
| Formica limata  Wheeler, 1913 | 0 | 
| Formica mellea  Say, 1836 | 0 | 
| Formica microgyna  Wheeler, 1903 | 0 | 
| Formica moki  Wheeler, 1906 | 0 | 
| Formica montana  Wheeler, 1910 | 0 | 
| Formica neoclara  Emery, 1893 | 0 | 
| Formica neogagates  Viereck, 1903 | 0 | 
| Formica neorufibarbis  Emery, 1893 | 0 | 
| Formica obtusopilosa  Emery, 1893 | 0 | 
| Formica occulta  Francoeur, 1973 | 0 | 
| Formica omnivora  Linnaeus, 1758 | 0 | 
| Formica pachucana  Francoeur, 1973 | 0 | 
| Formica pacifica  Francoeur, 1973 | 0 | 
| Formica pallidefulva  Latreille, 1802 | 0 | 
| Formica pallipes  Fabricius, 1793 | 0 | 
| Formica perpilosa  Wheeler, 1913 | 0 | 
| Formica podzolica  Francoeur, 1973 | 0 | 
| Formica propatula  Francoeur, 1973 | 0 | 
| Formica pulla  Francoeur, 1973 | 0 | 
| Formica retecta  Francoeur, 1973 | 0 | 
| Formica rubicunda  Emery, 1893 | 0 | 
| Formica simillima  Smith, 1862 | 0 | 
| Formica striata  Smith, 1862 | 0 | 
| Formica subcyanea  Wheeler, 1913 | 0 | 
| Formica subintegra  Wheeler, 1908 | 0 | 
| Formica subpolita  Mayr, 1886 | 0 | 
| Formica subsericea  Say, 1836 | 0 | 
| Formica truncorum  Fabricius, 1804 | 1 | 
| Formica xerophila  Smith, 1939 | 0 | 
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