North Down's Irish Cup agony in Dublin shows no sign of ending. Even 96 from Nick Larkin could not prevent another second round exit, their third in a row in Leinster and their eighth against Dublin opposition in the last 10 years.
Merrion, who had won at The Green in 2009, defended 250 with Larkin's dismissal, when the Comber side needed 44 from 32 balls, sealing their fate.
There are only three Ulster sides in the last eight and all came from inter-union games.
Griffin Nieuwoudt scored 103 for Civil Service North as they knocked out Bready, the home side coming up eight runs short in their pursuit of 261 despite an unbeaten 100 from Romano Ramoo.
Waringstown managed to use home advantage to the full as they simply thrashed Donemana by 172 runs.
The Villagers scored 284 for four, with 71 coming off the last five overs and then proceeded to bowl out the Tyrone side for a mere 111.
Fox Lodge at least kept the North West flag flying after a seven wickets success over depleted Carrickfergus, without the injured Mikey Taiaroa and Ryan Eagleson.
An unbeaten 67 by Ifti Hussain saw the Foxes home after captain Jonny Robinson had taken five wickets in seven overs to dismiss the NCU Section One side for a total of 159.
That total would have been more than enough for CIYMS who, agonisingly lost by one wicket to The Hills at Milverton.
Craig Boultwood top scored with 26 as the NCU champions were bowled out for 126 and, although they then reduced the holders to 55 for five and 113 for nine, Taimur Khan handed them the match with a wide.