This species is only known from Western Australia, and therefore did not feature in Evans’ 1982 revision. I have included it in the summary table (matrix), along with two other species known from the west. This one is such a good match with the original description that I feel comfortable suggesting the ID … despite no recent review of western Cerceris.

- distinctive colour pattern, with bright reddish-orange markings including T1, T2 and T5 …. but with T3 & T4 black

https://inaturalist.ala.org.au/observations/163623099
(image courtesy Steve Dew)