The scientific name of the so-called Zigzag Fruit Chafer of southern Africa is valid and correct as a species-level name and not as a subspecies-level name. “Anisorrhina flavomaculata subsp. flavomaculata” has been invalid since November 2000.
 
Holm (1993), in a rather weak paper, divided Anisorrhina flavomaculata into three subspecies:

• Anisorrhina flavomaculata flavoplagiata (Moser, 1919);

• Anisorrhina flavomaculata laeviplaga (Raffray, 1877); and

• Anisorrhina flavomaculata flavomaculata (Fabricius, 1798), the nominotypical subspecies.

 
Antoine (2000) more carefully reconsidered these taxa, presented sound reasoning, and raised both Anisorrhina flavoplagiata (Moser) of northeast Africa and Anisorrhina laeviplaga (Raffray) of East Africa to species level. That, of course, meant that the nominotypical subspecies became redundant and invalid: it fell away automatically, but the nomenclatural change was also formally enacted by Antoine (2000). The proper name of the Zigzag Fruit Chafer of southern Africa hence became Anisorrhina flavomaculata (Fabricius) -- no subspecies.
 
Subsequent to this change by Antoine (2000) there has been quite a number of uninformed authors still using the subspecies name (as a trinomen) for this insect. They are simply wrong and their mistake should not be propagated.
 
 
REFERENCES
Antoine P (2000) Nouveaux Cétonides de l’Angola (Coleoptera, Cetoniidae). Entomologia Africana 5(2): 20–29.
Holm E (1993) On the genera of African Cetoniinae: Anisorrhina Westwood 1842, Melinesthes Kraatz 1880 and Inhambane Péringuey 1907. Tropical Zoology 6(1): 165–177. doi:10.1080/03946975.1993.10539217.