Neriidae is a family of true flies (Diptera) closely related to the Micropezidae. Some species are known as cactus flies while others have been called banana stalk flies and the family was earlier treated as subfamily of the Micropezidae which are often called stilt-legged flies. Like the Micropezidae, they have long legs and are found in damp or rotting vegetation where. They however differ in having no significant reduction of the forelegs as seen in the Micropezidae. There are about 100 species in 20 genera.
Neriidae are slender, long-legged flies. Many species are sexually dimorphic, with males having more elongated bodies, heads, antennae and legs than females. Neriid flies are saprophagous. Larvae develop in rotting vegetable matter, including bark and fruit. Neriid adults tend to aggregate on rotting vegetable matter or damaged tree trunks. Neriid adults are also attracted to flowers, or other sources of sugar. The arista on the antenna arises at the tip unlike dorsally as in the Micropezidae. The forelegs are long with prominent coxae. In the Micropezidae, the forelegs are reduced. The third and fourth veins of the wing converge at the tip and the first vein is not setulose.