| Taxon |
Description |
| Maccaffertium |
A
genus within the Flatheaded family of Mayflies |
| Macrodiplax |
A
genus within the Skimmer family of Dragonflies |
| Macromia |
A
genus within the Emerald family of Dragonflies |
| Macropelopia |
A
genus within the Midges family of (aquatic) True Flies |
| Macrostemum |
A
genus within the Common net-spinner family of Caddisflies |
| Macrothemis |
A
genus within the Skimmer family of Dragonflies |
| Malenka |
A
genus within the Spring Stoneflies family of Stoneflies |
| Manophylax |
A
genus within the Apataniid case maker family of Caddisflies |
| Maruina |
A
genus within the Moth Flies family of (aquatic) True Flies |
| Mayacnephia |
A
genus within the Black Flies family of (aquatic) True Flies |
| Mayatrichia |
A
genus within the Purse case maker family of Caddisflies |
| Megaleuctra |
A
genus within the Rollwinged family of Stoneflies |
| Megaloptera |
The
order of Alderflies & Dobsonflies & Fishflies within New-winged Insects |
| Megarcys |
A
genus within the Perlodid family of Stoneflies |
| Meringodixa |
A
genus within the Dixid Midges family of (aquatic) True Flies |
| Mesocapnia |
A
genus within the Slender Winter family of Stoneflies |
| Mesovelia |
A
genus within the Water Treader family of Waterbugs |
| Mesoveliidae |
The
Water Treader family of Waterbugs |
| Metacnephia |
A
genus within the Black Flies family of (aquatic) True Flies |
| Metretopodidae |
The
Cleftfoot minnow family of Mayflies |
| Metretopus |
A
genus within the Cleftfoot minnow family of Mayflies |
| Metrichia |
A
genus within the Purse case maker family of Caddisflies |
| Metriocnemus |
A
genus within the Midges family of (aquatic) True Flies |
| Miathyria |
A
genus within the Skimmer family of Dragonflies |
| Micrasema |
A
genus within the Humpless case maker family of Caddisflies |
| Micrathyria |
A
genus within the Skimmer family of Dragonflies |
| Microcylloepus |
A
genus within the Riffle Beetle family of (aquatic) Beetles |
| Micropsectra |
A
genus within the Midges family of (aquatic) True Flies |
| Microtendipes |
A
genus within the Midges family of (aquatic) True Flies |
| Microvelia |
A
genus within the Shortlegged Water Strider family of Waterbugs |
| Molanna |
A
genus within the Hood case maker family of Caddisflies |
| Molannidae |
The
Hood case maker family of Caddisflies |
| Molophilus |
A
genus within the Crane Flies family of (aquatic) True Flies |
| Monodiamesa |
A
genus within the Midges family of (aquatic) True Flies |
| Moselia |
A
genus within the Rollwinged family of Stoneflies |
| Moselyana |
A
genus within the Apataniid case maker family of Caddisflies |
| Muscidae |
The
Aquatic Muscids (House Flies) family of (aquatic) True Flies |
| Mystacides |
A
genus within the Longhorned case maker family of Caddisflies |
| Myxosargus |
A
genus within the Aquatic Soldier Flies family of (aquatic) True Flies |