Juvenal is here alluding to two passages of Horace's hexameter poetry in particular. First, by listing various alternative genres (epic, comedy, elegy, tragedy) before stating his own preference for writing satire (19 hoc campo), Juvenal recalls Horace's use of the same technique at S. 1.10.40ff. Second, Juvenal has borrowed several words, phrases, and ideas from Hor. Epist. 2.2.90–105