There are four species that have a black second antennal segment:
Chrysopa perla, Chrysopa commata, Chrysopa abbreviata, Chrysopa phyllochroma
Chrysopa perla
A distinct blue-green coloured lacewing, the defining features are shown in the below image.
Chrysopa commata
A distinct feature of this species is the dark colouring of the sutures on the thorax.
Chrysopa abbreviata
An important defining feature is the toothed tarsal claw.
Chrysopa phyllochroma
Defining features in below image.
