How to pass predicate to function in C#?

I have :

 public void InitializeStatusList(DropDownList list)
    {
       var dictionaryEntries = GetEntriesFromDatabase();
       list.DataSource = dictionaryEntries.Where(entry => entry is EntryStatus1 || entry is EntryStatus2);
       list.DataBind();           
    }

I have many of these functions. I want to write common function with dictionaryEntries query condition passed as predicate.

For example:

public void InitializeStatusList(DropDownList list)
{
    CommonInitializeStatusList(DropDownList list, entry => entry is EntryStatus1 || entry is EntryStatus2);
}

public void CommonInitializeStatusList(DropDownList list, ??????????????? predicate)
{                       
    var dictionaryEntries = GetEntriesFromDatabase();
    list.DataSource = dictionaryEntries.Where(predicate);
    list.DataBind();        
}

What stands for ???????????????

Thanks in advance