| Family | genus | species | author | Type Number | Category |
| Therevidae | Chromolepida | clavitibia | Webb and Irwin | 17029 | holotype |
| Therevidae | Chromolepida | mexicana | Cole | 1337 | holotype |
| Therevidae | Cyclotelus | badicrusus | Irwin and Webb | 16437 | holotype |
| Therevidae | Megalinga | insignata | Irwin and Lyneborg | 13670 | holotype |
| Therevidae | Nebritus | powelli | Webb and Irwin | 16630 | holotype |
| Therevidae | Parapherocera | macswaini | Irwin | 10449 | holotype |
| Therevidae | Parapherocera | montana | Irwin | 10450 | holotype |
| Therevidae | Parapherocera | wilcoxi | Irwin | 10451 | holotype |
| Therevidae | Pherocera | arnaudi | Irwin | 10452 | holotype |
| Therevidae | Pherocera | bechteli | Irwin | 10453 | holotype |
| Therevidae | Pherocera | bishopensis | Irwin | 10454 | holotype |
| Therevidae | Pherocera | boharti | Irwin | 10455 | holotype |
| Therevidae | Pherocera | boydi | Irwin | 10456 | holotype |
| Therevidae | Pherocera | brunnea | Irwin | 10457 | holotype |
| Therevidae | Pherocera | cavagnaroi | Irwin | 10458 | holotype |
| Therevidae | Pherocera | colei | Irwin | 10460 | holotype |
| Therevidae | Pherocera | deserticola | Irwin | 10461 | holotype |
| Therevidae | Pherocera | halli | Irwin | 10462 | holotype |
| Therevidae | Pherocera | housei | Irwin | 10463 | holotype |
| Therevidae | Pherocera | hurdi | Irwin | 10464 | holotype |
| Therevidae | Pherocera | imperialensis | Irwin | 10465 | holotype |
| Therevidae | Pherocera | johnsoni | Irwin | 10466 | holotype |
| Therevidae | Pherocera | milleri | Irwin | 10467 | holotype |
| Therevidae | Pherocera | mojavensis | Irwin | 10468 | holotype |
| Therevidae | Pherocera | nevadensis | Irwin | 10469 | holotype |
| Therevidae | Pherocera | nigragena | Irwin | 10470 | holotype |
| Therevidae | Pherocera | nigrifrons | Irwin | 10471 | holotype |
| Therevidae | Pherocera | nigripes | Cole | 1336 | holotype |
| Therevidae | Pherocera | paractia | Irwin | 10459 | holotype |
| Therevidae | Pherocera | parkeri | Irwin | 10472 | holotype |
| Therevidae | Pherocera | quezadai | Irwin | 10473 | holotype |
| Therevidae | Pherocera | rauchi | Irwin | 10474 | holotype |
| Therevidae | Pherocera | rufoabdominalis | Irwin | 10475 | holotype |
| Therevidae | Pherocera | rupina | Irwin | 10476 | holotype |
| Therevidae | Pherocera | schlingeri | Irwin | 10477 | holotype |
| Therevidae | Pherocera | sinaloa | Irwin | 10478 | holotype |
| Therevidae | Pherocera | tevisi | Irwin | 10479 | holotype |
| Therevidae | Pherocera | tomentamala | Irwin | 10480 | holotype |
| Therevidae | Phycus | frommeri | Webb and Irwin | 15741 | holotype |
| Therevidae | Psilocephala | acuta | Adams in Snow | 6279 | syntype |
| Therevidae | Psilocephala | argentifrons | Cole | 11631 | holotype |
| Therevidae | Psilocephala | fuscipennis | Cole | 1487 | holotype |
| Therevidae | Psilocephala | pollinosa | Cole | 1489 | holotype |
| Therevidae | Psilocephala | tepocae | Cole | 1338 | holotype |
| Therevidae | Psilocephala | variegata flavipilosa | Cole | 1485 | holotype |
| Therevidae | Psilocephala | variegata occidentalis | Cole | 1484 | holotype |
| Therevidae | Schlingeria | ammobata | Irwin | 10481 | holotype |
| Therevidae | Thereva | flavipilosa | Cole | 1494 | holotype |
| Therevidae | Thereva | foxi | Cole | 1493 | holotype |
| Therevidae | Thereva | vanduzeei | Cole | 1490 | holotype |