| Aporus minimus Cresson, 1872 |
| Aporus rufiventris Cresson, 1872 |
| Arachnodaicter Pate, 1946 |
| Arachnodaicter divisus Pate, 1946 |
| Arachnophila Ashmead, 1902 |
| Arachnophila brevihirta Banks, 1945 |
| Arachnophila divisa Ashmead, 1902 |
| Arachnophroctonus Howard, 1901 |
| Arachnophroctonus anahuacensis Bradley, 1944 |
| Arachnophroctonus apiculatus Smith, 1855 |
| Arachnophroctonus apiculatus subsp. hondurensis Dreisbach, 1954 |
| Arachnophroctonus apiculatus subsp. pretiosus Dreisbach, 1954 |
| Arachnophroctonus ferrugineus Say, 1824 |
| Arachnophroctonus ferrugineus var. annexus Banks, 1944 |
| Arachnophroctonus ferrugineus var. unicolor Banks, 1944 |
| Arachnophroctonus gaigei Dreisbach, 1954 |
| Arachnophroctonus tropicus Howard, 1901 |
| Arachnophroctonus variegatus Dreisbach, 1957 |
| Arachnospila Kincaid, 1900 |
| Argyrogenia Bradley, 1944 |