Tamatea couldn't mark the 40th anniversary of their 1982 Maddison Trophy triumph with victory over current holders Taradale, who won 48-14 at Bill Mathewson Park on Saturday.
An upset win in the Ray White Nash Cup round nine match would have put the hosts in the top eight with two games left before the Maddison Trophy quarter-finals.
It was Taradale's day, though, as they scored four tries in the second quarter to lead 22-0 at the break.
Any hope of an unlikely Tamatea comeback was dashed by another try to halfback Humphrey Sheild seconds after halftime, although the hosts did get two consolation tries themselves.
The second was scored by Magpies centre Dennon Robinson-Bartlett, who returned from his first season in Major League Rugby with the Toronto Arrows earlier in the week.