| Lamprojoppa Cameron, 1901 |
| Lampronota Curtis, 1832 |
| Lanugo Townes, 1962 |
| Lanugo fraternans (Cameron, 1885) |
| Lanugo hebetis Cameron, 1885 |
| Lanugo picta Townes, 1962 |
| Lanugo sororia (Cresson, 1872) |
| Laphyctes Förster, 1869 |
| Lareiga Cameron, 1903 |
| Lausoba Cameron, 1910 |
| Leptobatus Gravenhorst, 1829 |
| Leptocryptus Thomson, 1873 |
| Leptoglyphis Brèthes, 1927 |
| Leptothecus Cameron, 1903 |
| Letosha Cameron, 1909 |
| Leurus Townes, 1946 |
| Leurus caeruliventris Townes, 1946 |
| Leurus caeruliventris subsp. borealis Townes & Townes, 1959 |
| Leurus caeruliventris subsp. caeruliventris Townes, 1946 |
| Lichmeres Townes, 1946 |