Purusawalkam is a defunct legislative assembly constituencey, that includes the locality, Purasawalkam of Chennai City and its surroundings. Purasawalkam assembly constituency was part of Chennai Central (Lok Sabha constituency). It was later divided between Egmore and newly created Thiru-Vi-Ka Nagar assemlby constituencies.
References
Purasawalkam (State Assembly Constituency) Wikipedia(Text) CC BY-SA