Lonchoptera lutea 
Long-nosed Swamp Fly 
Loxocera cylindrica 
Lucilia porphyrina 
Lump-legged Swamp Fly 
Machimus cyanopus 
Machimus maneei 
Machimus rusticus 
Machimus sadyates 
Macrodiplosis majalis 
Macrodiplosis niveipila 
Macrodiplosis pustularis 
Maira aenea 
Mallophora fautrix 
Mallow Leaf Miner 
Margined Calligrapher 
Marmalade Hover Fly 
Marsh snipefly 
Meadow Sedgesitter 
Megistocera filipes fuscana 
Megistocera longipennis 
Melangyna damastor 
Melanina major 
Meligramma euchromum