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I have moved this to the correct category of arthropods for you.
Ant-mimicking Spider. Common genus would be Myrmarachne sp., maybe Myrmarachne plataleoides??
http://www.thephotoforum.com/threads/myr...
http://en.wikipedia.org/wiki/Myrmarachne...
Please, wait for others and/or verify yourself. There are tons of others around...
https://www.flickr.com/photos/mypinklotu...