<p>In Sweden we call this one Moon Damselfly. 
</p>
Its completly black on its back and i dont think any other specie from this genus has like that in my area.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/41502344@N02">Billy Lindblom</a> from Hallsberg, Sweden
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/billyboysfotocolection/4683178540/">Irish Damselfly (Coenagrion lunulatum)</a>