Neglected by my supervisor

I’m on a vacation scheme and my supervisor isn’t giving me any decent work. Shall I call graduate recruitment?

I’m on an Easter vacation scheme at a large City firm. I’m sat in the corporate department sharing an office with a senior associate. The problem is that he isn’t showing much interest in me and hasn’t given me any work to do other than the odd bit of proof reading. I don’t think it’s entirely his fault as he doesn’t have much work to do himself. What shall I do as I’m worried that I won’t get a good appraisal.