Some figures I need help identifying

These extra figures were included in an ebay purchase I made recently and I'm trying to work out what they might be.  They are Romans or Italian allies - and are of course in 15mm - but apart from that I don't have much clue.  Any help would be appreciated!

First up we have the line troops - triarii, principes, hastati:

Then we have the command group:

And finally, a shot of them all together:

Please excuse the poor photography - I'm doing this at work!