| Myrmecocystus depilis Forel, 1901 |
| Myrmecocystus flaviceps Wheeler, 1912 |
| Myrmecocystus hammettensis Cole, 1938 |
| Myrmecocystus hortusdeorum McCook, 1881 |
| Myrmecocystus idahoensis Cole, 1936 |
| Myrmecocystus intonsus Snelling, 1976 |
| Myrmecocystus kennedyi Snelling, 1969 |
| Myrmecocystus lugubris Wheeler, 1909 |
| Myrmecocystus melanoticus Wheeler, 1914 |
| Myrmecocystus melliger Forel, 1886 |
| Myrmecocystus melliger subsp. lomaensis Wheeler, 1912 |
| Myrmecocystus melliger subsp. mendax Wheeler, 1908 |
| Myrmecocystus melliger subsp. mimicus Wheeler, 1908 |
| Myrmecocystus melliger subsp. orbiceps Wheeler, 1908 |
| Myrmecocystus melliger var. depilis Forel, 1901 |
| Myrmecocystus melliger var. hortusdeorum McCook, 1881 |
| Myrmecocystus melliger var. placodops Forel, 1908 |
| Myrmecocystus melliger var. semirufus Emery, 1893 |
| Myrmecocystus melliger var. testaceus Emery, 1893 |
| Myrmecocystus mendax Wheeler, 1908 |