| Thecomyia | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | Pancrustacea |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Sciomyzidae |
| Subfamily: | Sciomyzinae |
| Tribe: | Tetanocerini |
| Genus: | Thecomyia Perty, 1833 |
| Type species | |
| Thecomyia longicornis Perty, 1833 | |
Thecomyia is a Neotropical genus of flies in the family Sciomyzidae, the marsh flies or snail-killing flies.