| Negalius Casey, 1891 |
| Negalius marmoratus Casey, 1891 |
| Nematognatha Gemminger & Harold, 1870 |
| Nematognatha atra (Dugès, 1889) |
| Nematognatha brevicollis (Champion, 1892) |
| Nematognatha ephippiata (Champion, 1892) |
| Nematognatha flava (Dugès, 1889) |
| Nematognatha foveifrons (Champion, 1892) |
| Nematognatha rufa (Dugès, 1889) |
| Nematognatha tarasca (Dugès, 1889) |
| Nematognatha zonitoides (Dugès, 1874) |
| Nemognatha Illiger, 1807 |
| Nemognatha (Meganemognatha) Enns, 1956 |
| Nemognatha (Meganemognatha) bridwelli Wellman, 1912 |
| Nemognatha (Meganemognatha) explanata Enns, 1956 |
| Nemognatha (Meganemognatha) lurida LeConte, 1853 |
| Nemognatha (Meganemognatha) lurida subsp. apicalis LeConte, 1853 |
| Nemognatha (Meganemognatha) lurida subsp. lurida LeConte, 1853 |
| Nemognatha (Meganemognatha) lutea LeConte, 1853 |
| Nemognatha (Meganemognatha) lutea subsp. lutea LeConte, 1853 |