| Bassus pacificus Cresson, 1869 |
| Bassus pulchripes Provancher, 1875 |
| Bassus scutellaris Cresson, 1868 |
| Bassus spiracularis Muesebeck, 1927 |
| Bassus sycophanta Cresson, 1868 |
| Bassus tripicticrus Walsh, 1873 |
| Bassus urupensis Uchida, 1935 |
| Bassus venustulus de Saussure, 1890 |
| Bassus xanthopsis (Ashmead, 1890) |
| Betelgeuse Shaw, 1989 |
| Betelgeuse aztecus Shaw, 1989 |
| Binodoxys Mackauer, 1960 |
| Binodoxys impatientini (Stary & Remaudiere, 1983) |
| Binodoxys tamaliae (Stary & Remaudiere, 1983) |
| Biophthora Förster, 1862 |
| Biosteres Förster, 1862 |
| Biosteres foveolatus Crawford, 1912 |
| Biosteres longicaudatus Silvestri, 1916 |
| Biosteres longicaudatus var. compensas Silvestri, 1916 |
| Biosteres millironi Fischer, 1970 |