Rose chafer  (Cetonia aurata)

Elytra: In beetles and earwigs, the hard fore wings. They are held aloft when the insect flies, and are often coloured or patterned.
Hibernating: A winter survival strategy characteristic of some mammals in which an animal's metabolic rate slows down and a state of deep sleep is attained. Whilst hibernating, animals survive on stored reserves of fat that they have accumulated in summer. In insects, the correct term for hibernation is ‘diapause', a temporary pause in development and growth. Any stage of the lifecycle (eggs, larvae, pupae or adults) may enter diapause, which is typically associated with winter.
Larvae: Stage in an animal's lifecycle after it hatches from the egg. Larvae are typically very different in appearance to adults; they are able to feed and move around but usually are unable to reproduce.
Pupate: The process of forming a pupa, the stage in an insect's development, when huge changes occur that reorganise the larval form into the adult form. In butterflies the pupa is also called a chrysalis.

1. National Biodiversity Network Species Dictionary (September, 2003)
   http://www.nbn.org.uk/
   
2. Harde, K.W. (2000) A field guide in colour to beetles. Silverdale Books, Leicester.
   
3. Brickfields Country Park (October, 2003)
   http://www.brickfieldspark.org/data/scarab_rose_chafer.htm
   
4. Buczaki, S. (2002) Fauna Britannica. Hamlyn, London.