This is an audience participation post. (Actually all my blog posts are!)  I have a practical question at the end, but I can never simply and directly get to the point.  I've got to ramble first and show pictures. 

Speaking of pictures--have you ever noticed that photo negatives are rather disturbing?  They have a disquieting way of turning familiar people and animalsinto freakish creatures with black cavernous mouths and spooky white eyes. 

These particular shots were eerily fascinating to me in negative form: 

(Fun tip for Photoshop users--converting a normal image to a photo-negative effect is as easy as pressing the "Control" key and "i" simultaneously.  Just think "i" for invert.)

The "positive" of these pictures are less otherworldly and marine.  (I live in Wyoming; marine life is otherworldly.)  In fact the photos are commonplace, flat and the lighting was awful.  These pictures were taken in the loft of our barn, not because I think they'd be interesting photographic subjects, but because I'm hopeful that others can help me identify them.

We are cautious going up to the barn loft these days, choosing cool days when the wasps will be sluggish.  Attached to the door of the loft are the following homes.

Ok, so here's my question: what inhabits these dwellings?  I'm pretty sure at least one of the types is a wasp nest.  We'd like to evict our unwelcome waspish tenants, but we don't want to mistakenly vanquish any little honey bee friends.  

In short, are they positive or negative?