Thanks to your clues, smart observations and comments on my previous post "UFO on UFO", the flower and the bug has been identified.
The flower is Bauhinia acuminata while the bug is Amata huebneri. Both the flower and the bug are natives here.
The flowers of the Bauhinia acuminata is about 3 inches in diameter. Each flower has 5 petals which are a bright white in colour. When in bloom, they look like snowflakes on the branches and they also exude a nice fragrance with a hint of the scent of roses. You can use them as cut flowers.
The leaves are shaped like ox-hooves.
“Bauhinia acuminata”, a copyrighted post, was written for My Nice Garden blog by Autumn Belle @ http://www.mynicegarden.com/ on June 1st, 2011.