Could be from the genus Cheiracanthum, most specifically the species mildei since it has a similar anatomy. The pedipalps are quite large with the large segment of the pedipalp having a dark black colour much like that of Cheircanthum mildei. Though I am unsure because this type of arachnid is not endemic nor usually seen in New Zealand.
they only seem to get to this size, i can only find them in the Mt Roskill region of Auckland, could be an accidental import, I don't know.
under podocarp bark flake