How do I delete undownloaded podcasts from my ITunes list?

I have listened to every episode of many podcasts, after I finish and episode I delete it leaving only the unheard podcasts in my library. I just installed the new update and it now shows every available episode of all of my podcasts. I have heard most of them and want to delete them. I do not see an option to delete an undownloaded podcast. Once it is downloaded, it can be deleted. I would have to download hundreds of podcasts just to delete them.

Please help!!!