Length 2.7 cm, but others are bigger.
See comments for sighting 4246800. I hope these photos provide the necessary details for identification, but if not I can take more. Ken Walker says in the BowerBird link that D. semivitta occurs in Victoria.
ALA show the species Drymaplaneta semivitta to be more widespread than Victoria: https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:4084ab92-7a98-420a-a1da-fbb5b970006d
David Rentz in 'A guide to the cockroaches of Australia' has D. semivitta (which he calls the Western Wood Runner) confined to WA, with D. communis (Eastern Wood Runner) in the south-east part of the continent. As Michael notes, the ALA maps show a more extensive distribution for D. semivitta.