| Rhynchanthrax quivera (Painter, R. H., 1933) |
| Rhynchanthrax rex (Osten-Sacken, 1886) |
| Rhynchanthrax texana (Painter, R. H., 1933) |
| Sparnopolius Loew, 1855 |
| Sparnopolius aurifluus (Bezzi, 1924) |
| Sparnopolius brevicornis Loew, 1872 |
| Sparnopolius brevirostris (Macquart, 1840) |
| Sparnopolius coloradensis Grote, 1867 |
| Sparnopolius confusus (Wiedemann, 1824) |
| Sparnopolius cumatilis Grote, 1867 |
| Sparnopolius diversus Williston, 1901 |
| Sparnopolius fulvus (Wiedemann, 1821) |
| Sparnopolius fuscipes (Bigot, 1892) |
| Sparnopolius lherminierii (Macquart, 1840) |
| Sparnopolius ochrobasis Hall & Evenhuis, 1982 |
| Sphenoidoptera Williston, 1901 |
| Sphenoidoptera varipennis Williston, 1901 |
| Stonyx Osten-Sacken, 1886 |
| Stonyx clelia Osten-Sacken, 1886 |
| Stonyx clotho (Wiedemann, 1830) |