Question: What was St. Augustine's nickname for a 2nd Century AD story whose characters appeared in Greek art in the 4th century BC?

Context paragraphs:
Cupid and Psyche: Cupid and Psyche is a story originally from "Metamorphoses" (also called "The Golden Ass"), written in the 2nd Century AD by Lucius Apuleius Madaurensis (or Platonicus).  It concerns the overcoming of obstacles to the love between Psyche ( , Greek: Ψυχή ] , "Soul" or "Breath of Life") and Cupid (Latin "Cupido," "Desire") or Amor ("Love", Greek Eros ’′Ερως), and their ultimate union in a sacred marriage.  Although the only extended narrative from antiquity is that of Apuleius, Eros and Psyche appear in Greek art as early as the 4th century BC.  The story's Neoplatonic elements and allusions to mystery religions accommodate multiple interpretations, and it has been analyzed as an allegory and in light of folktale, "Märchen" or fairy tale, and myth.

Euromus: Euromus (Greek: Εὔρωμος ) – also, Eunomus and Eunomos; earlier Kyromus and Hyromus – was an ancient city in Caria, Anatolia; the ruins are approximately 4 km southeast of Selimiye and 12 km northwest of Milas (the ancient "Mylasa"), Muğla Province, Turkey.  Probably dating from the 6th century BC,  Euromus was a member of the Chrysaorian League during Seleucid times.  Euromus also minted its own coins from the 2nd century BC to the 2nd century AD.

Pharnavazid dynasty: The Pharnavazid, Pharnabazid or Parnavazianni (Georgian: ფარნავაზიანები, ფარნავაზიანნი ) is the name of the first dynasty of Georgian kings of Kartli (Iberia) preserved by "The Georgian Chronicles".  Their rule lasted, with intermissions, from the 3rd century BC to the 2nd century AD.  The main male line is reported to have become extinct early on and followed by houses related to it in the female line.  By the close of the 2nd century AD, the Pharnavazid rule came to an end and the Arsacid Dynasty took over the crown of Iberia.

Antiochus of Athens: Antiochus of Athens (Greek: Ἀντίοχος ὁ Ἀθηναῖος ) was an influential Hellenistic astrologer who flourished sometime between the late 1st and mid 2nd century AD.  There is some disagreement as to when he lived and wrote.  Franz Cumont and others have argued that he lived as early as the 1st century BC, while David Pingree placed him as late as the end of the 2nd century AD.  The one agreed datum is that Antiochus is referenced by Porphyry (234-c.  305 AD), and so Antiochus must have lived before the death of Porphyry.

Burebista: Burebista (Ancient Greek: Βυρεβίστας, Βοιρεβίστας ) was a Thracian king of the Getae and Dacian tribes from 82/61 BC to 45/44 BC.  He was the first king who successfully unified the tribes of the Dacian kingdom.  The Dacian kingdom comprised the area roughly located between the Danube, Tisza and Dniester rivers and covering modern day Romania.  In the 7th and 6th Centuries BC it became home to the Thracian peoples, including Getae and Dacians.  From the 4th century to the middle of the 2nd century BC the Dacian peoples were influenced by La Tène Celts who brought new technologies with them into Dacia.  Sometime in the 2nd century BC, however, the Dacians expelled the Celts from their lands.  Dacians often warred with the Getae, however, the relative isolation of the Dacian peoples located around the Carpathian mountains allowed them to survive and even to thrive.  By the 1st century BC, the Dacians had become the dominant tribe.

Demetrius of Alopece: Demetrius of Alopece (Greek: Δημήτριος ), was a Greek sculptor of the early part of the 4th century BC, who is said by ancient critics to have been notable for the lifelike realism of his statues.  His portrait of Pellichus, a Corinthian general, "with fat paunch and bald head, wearing a cloak which leaves him half exposed, with some of the hairs of his head flowing in the wind, and prominent veins", was admired by Lucian.  He was contrasted with Cresilas, an idealizing sculptor of the generation before.  Since however the peculiarities mentioned by Lucian do not appear in Greek portraits before the 3rd century BC and since the Greek art of the 4th century consistently idealizes, there would seem to be a difficulty to explain.

Caspiane: Caspiane, or Kaspiane (Armenian: Կասպք "Kaspkʿ") was the land populated by the tribe of Caspians, after whom it received its name.  Originally a province of Medes in the 3rd-2nd centuries BC, the land of the Caspians was conquered by Armenians in the 2nd century BC, then passed to Caucasian Albania under Sassanid Persian suzerainty in the 5th century, and later became an independent state.  In the 2nd century AD, it became known as Paytakaran, and after 387 AD.  became a part of the larger region of Balasakan.

The Golden Ass: The Metamorphoses of Apuleius—which St. Augustine referred to as The Golden Ass ("Asinus aureus")—is the only ancient Roman novel in Latin to survive in its entirety.

Ancient Greek: Ancient Greek includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.  It is often roughly divided into the Archaic period (9th to 6th centuries BC), Classical period (5th and 4th centuries BC), and Hellenistic period (3rd century BC to the 6th century AD).  It is antedated in the second millennium BC by Mycenaean Greek.

Castra of Hoghiz: The castra of Hoghiz was a fort in the Roman province of Dacia.  The fort was built, in the 2nd century AD, on the left bank of the Olt River, at a place where a Dacian settlement existing already in the 2nd century BC was unearthed.  The fort and the nearby village were abandoned in the 3rd century AD.  The ruins of the castra are located in Hoghiz, Romania.

Supporting paragraphs: Cupid and Psyche The Golden Ass
Answer: The Golden Ass