http://penelope.uchicago.edu/T…us/de_Poetis/Vergil*.html
I've found the relevant passage in Seutonius.
QuoteVergil spent his early life at Cremona until he assumed the gown of manhood, upon his fifteenth birthday, in the consulship of the same two men who had been consuls the year he was born; and it chanced that the poet Lucretius died that very same day.
Most of Seutonius' De Poetis is lost, or else we might have quite a lot more to go on with Lucretius.