| microdon tristis | | Canada:Ontario | | 586797319 |
| microdon tristis | | Canada: Ontario, Constance Bay | | 915477512 |
| microdon tristis | | Canada: Ontario, Pukaskwa National Park | | 1015583757 |
| microdon tristis | | Canada: Ontario, Leeds and Grenville, Elizabethtown-Kitley, 4452 Rowsome Rd., Elizabethtown | | 1053138667 |
| microdon tristis | | canada: ontario, cambridge, rare charitable research reserve, site 3 - grassy wetland | | 1318751183 |
| microdon tristis | | canada: ontario, cambridge, rare charitable research reserve, site 3 - grassy wetland | | 1321382577 |
| microdon tristis | | canada: ontario, thousand islands national park | | 1389468533 |