| Myrmecocystus mexicanus Wesmael, 1838 |
| Myrmecocystus mexicanus subsp. navajo Wheeler, 1908 |
| Myrmecocystus mexicanus var. idahoensis Cole, 1936 |
| Myrmecocystus mexicanus var. melanoticus Wheeler, 1914 |
| Myrmecocystus mexicanus var. mojave Wheeler, 1908 |
| Myrmecocystus mimicus Wheeler, 1908 |
| Myrmecocystus mojave Wheeler, 1908 |
| Myrmecocystus navajo Wheeler, 1908 |
| Myrmecocystus nequazcatl Snelling, 1976 |
| Myrmecocystus perimeces Snelling, 1976 |
| Myrmecocystus placodops Forel, 1908 |
| Myrmecocystus romainei Hunt & Snelling, 1975 |
| Myrmecocystus semirufus Emery, 1893 |
| Myrmecocystus tenuinodis Snelling, 1976 |
| Myrmecocystus testaceus Emery, 1893 |
| Myrmecocystus wheeleri Snelling, 1971 |
| Myrmecocystus yuma Wheeler, 1912 |
| Myrmecocystus yuma var. flaviceps Wheeler, 1912 |
| Myrmelachista Roger, 1863 |
| Myrmelachista amicta Wheeler, 1934 |