A 73-year-old man has been charged over an alleged hit and run that left a female cyclist dead in Perth's south.

Gabriele Schiller-Brett, 69, suffered critical injuries when she was knocked off her bike by a car at the intersection of Old Coast Road and McLarty Road in Halls Head around 9:45am on Tuesday.

She was taken to Peel Health Campus but died a short time later.

It is alleged the man, from Erskine, drove off after his car collided with Ms Schiller-Brett.

Police later located the man and his vehicle in Erskine.

He was charged with failing to offer assistance after a traffic incident causing bodily harm or death, and failing to report the incident to police.

The man is due to appear in Mandurah Magistrates Court on April 26.

Detectives from Major Crash appealed for anyone who saw the man's silver station wagon or the cyclist to contact police.