Melaloncha is a genus of phorid flies (Diptera: Phoridae) commonly referred to as "bee-killing flies". They are found almost exclusively in the Neotropical region, although there is one record from extreme southern Texas, United States. They are small flies, usually about 2–3 millimetres (0.08–0.12 in) in length. No true fossils are known, although there are some specimens in Colombian copal, of unknown (but likely relatively recent) age.