| Labidus rubra (Buckley, 1867) |
| Labidus saji Haldeman, 1852 |
| Labidus sayi Haldeman, 1852 |
| Labidus selysi (Forel, 1904) |
| Labidus serpentis (Weber, 1938) |
| Labidus servillei Westwood, 1842 |
| Labidus smithii (DallaTorre, 1892) |
| Labidus swainsonii Shuckard, 1840 |
| Labidus tepeguas (Norton, 1868) |
| Labidus vastator (Smith, 1860) |
| Labidus westwoodi (Emery, 1900) |
| Lachnomyrmex Wheeler, 1910 |
| Lachnomyrmex scrobiculatus Wheeler, 1910 |
| Lasiini Ashmead, 1905 |
| Lasius Fabricius, 1804 |
| Lasius (Acanthomyops) Fabricius, 1804 |
| Lasius alienoniger Forel, 1874 |
| Lasius alienus (Föerster, 1850) |
| Lasius americanus Emery, 1893 |
| Lasius aphidicola (Walsh, 1863) |