This is from a slightly older version but I'm sure they haven't changed it
Looks like you want to use an equals sign not a colon.
John the Ripper password cracker, version 1.7.1
Copyright (c) 1996-2006 by Solar Designer and others
Usage: john [OPTIONS] [PASSWORD-FILES]
--single "single crack" mode
--wordlist=FILE --stdin wordlist mode, read words from FILE or stdin
root@bt:/pentest/passwords/john# ./john --wordlist=password.lst |aircrack-ng -b XX:XX:XX:XX:XX:XX -w - /tmp/wpa*.cap