#3
Chloropidae: Trachysiphonella scutellata (Macquart, 1835) or T. ruficeps (von Roser, 1840).
Both species are abundant but very difficult to distinguish as they have a wide colour variability, variability of scutellar setae, widths of gena and length of proboscis. Larval substrate completely unknown. Sunny biotopes, dry meadows with many ants are optimal.