Scarlett, who claimed the Carji Greaves Medal as the Cats best and fairest in 2003, will represent Australia for the second consecutive season, having toured Ireland with the team last year.
The two Tests will be played at Subiaco Oval in Perth on Friday October 24 and the MCG on Friday October 31.
The full squad is: Leo Barry (Sydney), Peter Bell (Fremantle), Mark Bickley (Adelaide), Clint Bizzell (Melbourne), Nathan Brown (Western Bulldogs), Peter Burgoyne (Port Adelaide), Matthew Carr (Fremantle), Jared Crouch (Sydney), Shane Crawford (Hawthorn), Barry Hall (Sydney), Brent Harvey (Kangaroos), Paul Hasleby (Fremantle), Lenny Hayes (St Kilda), Glen Jakovich (West Coast), Brad Johnson (Western Bulldogs), Chris Johnson (Brisbane Lions), Brett Kirk (Sydney), Robert Murphy (Western Bulldogs), Matthew Pavlich (Fremantle), Luke Power (Brisbane Lions), Jade Rawlings (Hawthorn), Matthew Scarlett (Geelong), Adam Simpson (Kangaroos), Rohan Smith (Western Bulldogs), Daniel Wells (Kangaroos), David Wirrpunda (West Coast).
