afaik, the last few numbers and chars ("*.usbserial-XXXXXXX") are generated randomly and are unique for each port. Best is, to look it up at the Arduino Menu or any other software that is able to list the available serial ports.
If you're on a *nix system like eg. Mac OS X, you can also open up the Terminal and type:
cd /dev
ls tty.*
- or -
cd /dev
ls cu.*
Remember to connect your device, else it won't show up!
Best,
Michael