M. petersi is found in northeastern India (as far west as Bihar) and in Bangladesh.

The specific name, petersi, is in honour of German herpetologist Wilhelm Peters (1815–1883).

The last four vertebrals have a yellowish linear horseshoe mark with both ends directed forward.

Three yellow streaks are on each side of the head, the lower one extending from below the nostril to the angle of the mouth.

[5] Type locality: Huzurapur (Jessore District), Faridpur, and Dhaka, Bangladesh Mating of M. petersi occurs in the winter months, and nesting follows in April–May.