| Megathymus ursus subsp. ursus Poling, 1902 |
| Megathymus ursus subsp. violae Stallings & Turner, 1956 |
| Megathymus yuccae (Boisduval & LeConte, 1834) |
| Megathymus yuccae subsp. arizonae Tinkham, 1954 |
| Megathymus yuccae subsp. louiseae Freeman, 1963 |
| Megathymus yuccae subsp. martini D. Stallings & Turner, 1956 |
| Megathymus yuccae subsp. reubeni Stallings, Turner & V. Stallings, 1963 |
| Megathymus yuccae subsp. wilsonorum Stallings & Turner, 1958 |
| Megistias Godman, 1900 |
| Megistias argus Draudt, 1924 |
| Megistias ignarus Bell, 1932 |
| Megistias isus Godman, 1900 |
| Megistias labdacus Godman, 1900 |
| Megistias polistion Schaus, 1902 |
| Melanopyge Mielke, 2002 |
| Melanopyge erythrosticta (Godman & Salvin, 1879) |
| Melanopyge hoffmanni (Freeman, 1977) |
| Melanopyge mulleri (Bell, 1934) |
| Mellana Hayward, 1948 |
| Mellana freemani Steinhauser, 1974 |