Insect Identification (even the family name would do)
You've found a specimen of Coridius janus or cucurbit stink bug or red pumpkin bug (don't mix up with the red pumpkin beetle). They betong to the suborder Heteroptera (True bugs).


(picturefrom Wikipedia)

Also see:
projectnoah.org: red pumpkin bug

nbair.res.in: Coridius janus

indiabiodiversity.org: Coridius janus