Anceps.

Although the Scarce Chaser tends to dominate the streams and ditches around the town of Nydri on the Ionian Island of Lefkada,there is another dragonfly that shares this habitat.In the southern Balkans the Keeled Skimmer subspecies anceps is dominate, where the adult male may be all-pruinose.Unlike the Keeled Skimmers of northern Europe anceps frequent streams and ditches whereas its northern cousin prefers boggy acidic runnels.
A great surprise to me was also the sighting of a male Southern Skimmer Orthetrum brunneum, a species very similar to the Keeled Skimmer but differing in several features. 

A male Southern Skimmer

Immature male

Immature female