The Holocerina genus belongs to the Micragonini tribe within the Saturniinae subfamily. The fifteen species occur throughout Africa and are all medium to small (especially the males) sized. Many species look quite similar and a correct identification isn't always easy.
The caterpillars grow large for the size of the moths. There are often two totally different color forms. So different that if you didn't know better you would think the caterpillars belong to two different species. If you can get them to eat, they usually are fairly easy to rear. If you can get them to eat ... . It's not always possible. Some species do well on Ligustrum ovalifolium. For others the proper food plant still needs to be found (and it's not Ligustrum).