Meadow Plant Bug

Manval, thank you very, very much! :))))

hm.. it should be narrowed anteriorly, I added one more photo in which you can see that it is narrowed anteriorly :) (pronotum has green margins, so it looks confusing, but if you look closely enough, you can see how it becomes narrowed)
But maybe it is something else anyway, I'm still searching! ;)

At first sight I would say yes, Nabidae. Could be Nabis sp., nymph. But the pronotum looks confusing. Shouldn't that be more narrowed??
http://www.entomology.umn.edu/museum/lin...
The base of the antennae looks also quite thick for Nabidae. Maybe something other? Definitely a nymph.
Thorsten, can you help??
http://www.naturespot.org.uk/species/hea...
http://www2.pms-lj.si/heteroptera/nabfla...
http://commons.wikimedia.org/wiki/File:N...
https://www.flickr.com/photos/ashe/27753...
http://farm9.staticflickr.com/8072/82943...
http://bugguide.net/node/view/12327/bgpa...