Brightly coloured; elytra with three continuous fasciae forming relatively even and broad blackish bands joined along the suture and with varying degrees of blue to green reflections; elytral background red or orange; head, pronotum and ventral side are metallic blue to green

Two specimens from the extreme north-west of SA were tentatively attributed to Castiarina viridissima on this website. They were redetermined as C. vegeta in June 2026 because presumed diagnostic features of the former species (elytra with a more yellowish background colour and the premedial fascia not reaching the lateral margins) were found to be replicated within populations of C. vegeta. Also, raised elytral intervals noted by Barker 1987 as diagnostic within the cruentata species-group, are not particularly pronounced on the two north-western specimens. Thus, they seem better placed with C. vegeta even though they represent a major range extension for this species which is not otherwise known from central Australia.

Adults are found on a variety of white-flowered host plants, mainly in the Myrtle family (Myrtaceae). There is a notable representation from four species of the Mint family (Lamiaceae), which suggests a possible larval host association.