th'inhabitants o'th'earth and yet you are on't?'
'so withered and so wild in their attire'
-this shows how Banquo may be skeptical of the witches, 'should be women'
-alliteration of 'w', sounds like the wind, reflects how evil and eerie the situation is
-it also displays his confusion by the question
-his reaction is different to macbeth's, this could foreshadow how they are going to go separate ways