http://commons.wikimedia.org/wiki/File:Blattellidae_sp._indet._1_male.jpg
probably the same species misidentified as Balta bicolor here:
http://lifeunseen.com/index2_item_3867.php
both images depict males, the female has abbreviated tegmina
it is one of the most common roaches in Auckland now. Biosecurity N.Z. have
tried to get it identified, but no luck ...