Bungarus lividus
Diet
Mainly other snakes
Range
India (North Bengal and the north-east), Bangladesh and Nepal
The lesser black krait is a venomous elapid found in India, Bangladesh and Nepal. It is a rather small snake with a smooth black to bluish-black back and a white upper lip. The belly scales are white with grey edges, and the small black eyes with round pupils sit towards the snout. The species name refers to its lead-coloured appearance (Wikipedia, general species account).
It feeds primarily on other snakes. The Reptile Database lists Meghalaya, Assam, Arunachal Pradesh and Nagaland. The account used here gives no information on size or breeding.