| Formica lobata De Geer, 1773 |
| Formica longicornis Latreille, 1802 |
| Formica longipes Jerdon, 1851 |
| Formica lutosa Smith, 1858 |
| Formica maculata Fabricius, 1782 |
| Formica marcida Wheeler, 1913 |
| Formica masonia Buckley, 1866 |
| Formica megacephala Fabricius, 1793 |
| Formica melanocephala Fabricius, 1793 |
| Formica microgyna Wheeler, 1903 |
| Formica microgyna var. recidiva Wheeler, 1913 |
| Formica migratoria De Geer, 1773 |
| Formica moki Wheeler, 1906 |
| Formica moki subsp. grundmanni Cole, 1943 |
| Formica moki subsp. xerophila Smith, 1939 |
| Formica montana Wheeler, 1910 |
| Formica nana Jerdon, 1851 |
| Formica neoclara Emery, 1893 |
| Formica neogagates Viereck, 1903 |
| Formica neorufibarbis Emery, 1893 |