Calliopum

Calliopum is a genus of small flies of the family Lauxaniidae.

==Description== thumb|left|thumbtime=0:24|Calliopum sp. in a meadow thumb|250px|right|Calliopum sp., Lateral view Most, but not all, are luscious black or metallic flies. They are smaller than 5 mm and usually have iridescent eyes. Adults can be found from May until December in meadows and hedge rows. The larvae may be phytophagous or saprophagous, mainly feeding on rotting vegetable matter or mining clover leaves.