This is a Bark Mantis, Liturgusidae, sometimes also called Lichen Mantis. There are some genus in India, I can only remember Humbertiella. Take it as a hint for further re-search...
Could be Humbertiella ceylonica.
http://www.bugzuk.com/insects/praying-mantis/humbertiella-ceylonica
http://www.indianaturewatch.net/view_cat.php?tag=Bark%20mantis
https://www.youtube.com/watch?v=ALf-SgRhGSk&feature=youtube_gdata_player
http://www.indianaturewatch.net/displayimage.php?id=9864
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