Parasited Cocoon

Juan, I may have misunderstood your description entry. These stalked eggs are always fascinating, especially on an unlikely substrate as this cocoon shell.

The eggs are indeed typical of lacewings. Lacewing (Chrysopa) larvae (or antlions) http://www.flickr.com/photos/puckyireth/3558925607/ are carnivorous and I expect they will eat only small things they can catch, such as aphids. I would guess these eggs were placed on the cocoon because it was alive (cool) and there was no plant found nearby.

This must be a rare sighting. Thanks for sharing.