Gerris (Gerris) lacustris (Linnaeus, 1758)

Material examined. Kateleios, stream, 35 m a.s.l., 38.07759° N 20.75291° E (WGS84; uncertainty = 15 m), 25.VII.2018, F. Cianferoni, F. Graziani, F. Ceccolini leg., 1 ♂, 1 ♀ brach., CFCF.

General distribution. This species is widely distributed across the Palaearctic Region (see Damgaard et al. 2014).

Remarks. This is the first record of this species from Cephalonia.