Narrow-bordered bee hawk-moth  (Hemaris tityus)

Palaearctic region: the region that includes Europe, the part of Asia to the north of the Himalyan-Tibetan barrier, North Africa and most of Arabia.
Pupa: stage in an insect's development when huge changes occur, which reorganise the larval form into the adult form. In butterflies the pupa is also called a chrysalis.
Univoltine: (also known as 'single-brooded'). Insect life cycle that takes 12 months to be complete, and involves a single generation. The egg, larva, pupa or adult over winters as a dormant stage.

1. UK BAP (December 2001):
   http://www.ukbap.org.uk
   
2. Skinner, B. (1984) Colour Identification Guide to Moths of the British Isles. Viking Press, London.
   
3. Carter, D. J. and Hargreaves, B. (1986) A Field Guide to caterpillars of butterflies and moths in Britain and Europe. Collins, London.
   
4. UK Moths (December 2001):
   http://www.ukmoths.force9.co.uk
   
5. Leverton, R. (2002) Pers. comm.