One of the prettiest butterflies dragonflies that we see during the summer is the Crimson-tailed marsh hawk dragonfly. The combination of red and black is stunning. And it's rather difficult to get a decent picture because they fly off the moment they 'sense' me around them!:) You can see a really great shot of this dragonfly and the details here...http://www.treknature.com/gallery/Asia/India/photo165074.htm
Edited to add....Oops, I made a mistake! Typed 'butterfly' instead of 'dragonfly'.