[Taxacom] anyone recognize this cockroach?

[Stephen Thorpe]

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 ...