Produced to coincide with the party conference season, the ads have appeared on the blogs Guido Fawkes, Recess Monkey, Labour Home and Conservative Home.
‘As an innovative and dynamic consultancy we are constantly looking to embrace new media opportunities,' said Citigate Public Affairs MD Rex Osborn.
‘Until now, blogs have been seriously under-utilised by PA firms,' he added.
‘Britain's leading bloggers are agenda-setting and are read by politicians and media insiders and influencers in Westminster and Whitehall,' said Guido Fawkes.
‘I am delighted to welcome the first spinmeistering firm to conspire with fellow plotters.'
The UK's political blogs are estimated to reach at least a million unique users a month.