Another signal fly photographed at the edge of the coastal forest 20km north of Durban.
ID credit: Dmitry Gavryushin (Diptera.info)
"Oeciotypa hendeli Lindner, 1957 (Platystomatidae, Plastotephritinae). Check Whittington, 2003" p189-192
I append the document link here. The picture and descriptions are a dead on match. This fly had also been collected at Umhlanga coastal bush, 20km down the road.