| Poecilognathus pulchellus (Williston, 1901) |
| Poecilognathus scolopax (Osten-Sacken, 1877) |
| Poecilognathus sulphureus (Loew, 1863) |
| Poecilognathus thlipsomyzoides Jaennicke, 1867 |
| Poecilognathus unimaculatus (Coquillett, 1904) |
| Poecilognathus vittatus (Hull, 1973) |
| Protepacmus Cockerell, 1916 |
| Protolomatia Cockerell, 1914 |
| Protophthiria Cockerell, 1914 |
| Pseudogeron Cresson, 1915 |
| Relictiphthiria Evenhuis, 1986 |
| Relictiphthiria chihuahuaensis Hall & Evenhuis, 1987 |
| Relictiphthiria insularis Hall & Evenhuis, 1987 |
| Relictiphthiria primogenita Evenhuis, 1986 |
| Relictiphthiria psi (Cresson, 1919) |
| Rhabdopselaphus Bigot, 1886 |
| Rhynchanthrax Painter, R. H., 1933 |
| Rhynchanthrax maria (Williston, 1901) |
| Rhynchanthrax nigrofimbriata (Williston, 1901) |
| Rhynchanthrax plagosa (Coquillett, 1887) |