I am not able to answer to your question but, when you post a photo of any insect, asking for its identification, I suggest to you to indicate always both the dimensions (length) of the specimen and the collecting data (country, region, date...): information which can be useful for an answer.
A species of Polyrhachis. Dr. Barry Bolton may be able to identify it. It always helps to give location, date and habitat information to any identifier. Thank you.