The white fuzzy thing on the left is, I think, the cocoon of an ichneumon wasp (Hymenoptera: Ichneumonidae). The long spotty thing on the right is the husk of the moth (or sawfly) caterpillar that the ichneumnon larva developed in. I am not sure what the transparent globular object is.
Here is another photo (by Linden Gledhill on Flickr) that shows an ichneumon cocoon beside the remains of its host.
Photo taken in Whiteknights Park, Reading, UK, on 2010-06-06.