A reliable stagnant water supply contained this materiel, along with a myriad of Aedes in different developmental stages. I believe the first image is the residual chitin of a pupal exoskeleton after the owner graduated to being a completed, flying mosquito. The second and third images, I'm not so sure; perhaps from one of the earlier stages of larval molting. All are stacked images, Zerene processed.
Nikon Labophot, CFN Plan 4X
Labophot, CFN Plan 4X
Labophot CFN Plan 10X
Images made through a microscope. All subject types.