This has improved 'lots already Keep it up
Still has some problems though, inconsistent anatomy being one of them.
I Think that you didn't really give the Leg behind the arm enough thought and it feels like it was an afterthought, It's important to plan everything out before, now it feels cramped and broken, same with the tail.
Another thing is that his head seems way to small for his quite massive body, I also think what you're having now seems a bit to boxy(but that might be a style choice)
I added further to Soulys edit to get some points across.
You should look up some references, there are a lot of ''Lizard-man art'' on the internet to take a look at, like the Lizardmen from warhammer:
http://www.wargamestore.com/images/T/gw8848.jpg
Another thing that seems a bit cramped is the pose, a bit cramped and random it doesn't really give much of a character.
Also you has some small amounts of banding/pillowshading going on but nothing serious.
Any way keep it up, looking forward to what you'll to do the other characters!