| Angeliconana Girault, 1922 |
| Anicetus Howard, 1896 |
| Anicetus annulatus Timberlake, 1919 |
| Anicetus primus (Howard, 1898) |
| Anisodromus Riek, 1962 |
| Anisotylus Timberlake, 1919 |
| Anusiella Mercet, 1923 |
| Anusioptera Brues, 1910 |
| Anusioptera aureocincta Brues, 1910 |
| Anusioptera koebelei Trjapitzin, 1997 |
| Apentelicus Fullaway, 1913 |
| Aphidencyrtus Ashmead, 1900 |
| Aphycomorpha Timberlake, 1919 |
| Aphycomorpha araucariae Timberlake, 1919 |
| Aphycus Mayr, 1876 |
| Aphycus flavus Howard, 1881 |
| Aphycus helvolus Compere, 1926 |
| Aphycus lounsburyi Howard, 1898 |
| Aphycus luteolus Timberlake, 1916 |
| Aphycus maculipes Howard, 1885 |