The Red-veined Darter is fairly easy to identify by the distinctive blue lower portion of the eye and red veins in the wings.

1st & 2nd photo: A male. Marina di Ostuni, Ostuni area, Brindisi, Puglia, 3 October 2024
3rd & 4th photo: A female. Collesalvetti, Livorno, Tuscany, Italy, 20 September 2019
5th photo: A female. Savona, Italy, 3 September 2016