Since this user is not in this forum, tagging is not possible.
Nor is it even necessary to create a scam accusation against him on this forum, since none of the alleged scamming took place here, and the person in question probably won't ever show up on bitcointalk--and if he does, it'll probably be under a different name if he's a serial scammer. I get that OP is rightfully pissed off, but I'm not sure how useful this is even as a warning (unless it shows up on Google results or something).
And OP, at least you didn't waste any more of your time with this jerkoff. A month and a half is a fairly long time to sacrifice, but there have been members here who've worked for bounties on spec for longer (if I'm not mistaken) and were promised more than $800 that they never ended up getting. Lesson learned for you, hopefully. Get the money in advance or, as has been suggested, have it escrowed beforehand at least.