| Aphestia nigra Bigot, 1878 |
| Apocleinae Papavero, 1973 |
| Archilestes Schiner, 1866 |
| Archilestris Loew, 1874 |
| Archilestris magnificus (Walker, 1854) |
| Aridefferia Artigas & Papavero, 1997 |
| Aridefferia snowi (Hine, 1919) |
| Arthriticopus Enderlein, 1914 |
| Asilidae Latreille, 1802 |
| Asilinae Latreille, 1802 |
| Asilini Latreille, 1802 |
| Asilus Linnaeus, 1758 |
| Asilus delicatulus Hine, 1918 |
| Asilus humilis Bellardi, 1861 |
| Asilus inamatus Walker, 1860 |
| Asilus mexicanus Macquart, 1846 |
| Asilus vescus Hine, 1918 |
| Atomosia Macquart, 1838 |
| Atomosia anonyma Williston, 1901 |
| Atomosia beckeri Jaennicke, 1867 |