Vivid Colors

I first spotted this beautiful critter on  a Ervatamia divaricata (Linn)  in my garden one day, and it had shifted to a Thibbatu ?Solanum violaceum Ortega next to it. After that it was nowhere to be seen, probably fell pray to a bird. Could any of you guys tell me which butterfly this caterpillar belongs to?   

 

Ravenous Caterpillar

I found this caterpillar on a Bael plant in my garden. At the rate this fellow works on the leaves, it's fair to call them 'pests' isn't it? I'll try to observe it's development and share it with you, hpefully.