In Greek

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

 and Roman mythology

Roman mythology

Roman mythology is the body of traditional stories pertaining to ancient Rome's legendary origins and religious system, as represented in the literature and visual arts of the Romans...

, Ocnus or Bianor was a son of Manto

Manto (mythology)

There are several distinct figures in Greek mythology named Manto, the most prominent being the daughter of Tiresias. The name Manto derives from Ancient Greek Mantis, "seer, prophet" .-Daughter of Tiresias:...

 and Tiberinus

Tiberinus (god)

Tiberinus is a figure in Roman mythology. He was added to the 3,000 rivers , as the genius of the river Tiber.According to Virgil's epic Aeneid, he helped Aeneas in his travel from Troy, suggesting to him that he land in Latium and gave him much other precious advice...

. He founded Mantua

Mantua

Mantua is a city and comune in Lombardy, Italy and capital of the province of the same name. Mantua's historic power and influence under the Gonzaga family, made it one of the main artistic, cultural and notably musical hubs of Northern Italy and the country as a whole...

 (modern Mantova). Alternatively, he was the son or brother of Auletes

Auletes

In some accounts, Auletes, , was the father or brother of Ocnus, founder of Felsina....

 and founded Felsina (modern Bologna

Bologna

Bologna is the capital city of Emilia-Romagna, in the Po Valley of Northern Italy. The city lies between the Po River and the Apennine Mountains, more specifically, between the Reno River and the Savena River. Bologna is a lively and cosmopolitan Italian college city, with spectacular history,...

) or Perusia

Perusia

The ancient Perusia, now Perugia, first appears in history as one of the 12 confederate cities of Etruria. It is first mentioned in the account of the war of 310 or 309 BC between the Etruscans and the Romans...

 or Cesena

Cesena

Cesena is a city and comune in the Emilia-Romagna region of northern Italy, south of Ravenna and west of Rimini, on the Savio River, co-chief of the Province of Forlì-Cesena. It is at the foot of the Apennines, and about 15 km from the Adriatic Sea.-History:Cesena was originally an Umbrian...

.

Ocnus was condemned to spend eternity in the netherworld, weaving a rope of straw. As depicted in the picture by Polygnotos, standing behind him is his donkey which eats the rope as fast as it is made.http://staff.washington.edu/fox/lib/ocnus1.jpg

Ocnus personifies hesitation, frustration, delay and the wasting of time and effort.