| Pentacnemus Howard, 1892 |
| Pentalitomastix Eady, 1960 |
| Phaenodiscus Förster, 1856 |
| Phaenodiscus arizonensis Howard, 1898 |
| Phasmencyrtus Gordh & Trjapitzin, 1978 |
| Pheidoloxeniscus Ghesquière, 1946 |
| Pheidoloxenus Ashmead, 1904 |
| Pheidoloxenus wheeleri Ashmead, 1904 |
| Philoponectroma Brèthes, 1913 |
| Placoceras Erdös, 1946 |
| Plagiomerus Crawford, 1910 |
| Plagiomerus cyaneus (Ashmead, 1888) |
| Plagiomerus diaspidis Crawford, 1910 |
| Platencyrtus Ferrière, 1955 |
| Platencyrtus esuriens (Erdös & Nowicki, 1955) |
| Platencyrtus parkeri Ferrière, 1955 |
| Platyencyrtus Erdös & Nowicki, 1955 |
| Prionomastix Mayr, 1876 |
| Prionomastix pulawskii Trjapitzin & Ruiz-Cancino, 1998 |
| Procheiloneurus Girault, 1920 |