Jonathan Davies (wearing head-guard) celebrates one of his three tries
Jonathan Davies claimed a hat-trick of tries as the Scarlets thrashed Magners League newcomers Aironi.
Andy Fenby started the rout on the half-hour before George North added a second before the break.
Aironi lost Jaco Erasmus to a yellow card after the restart and Davies twice capitalised.
Replacement Martin Roberts took the lead to 42-3, then Davies completed an emphatic night for the Scarlets before Nick Williams replied late on.
The win takes the Scarlets to second in the Magners League overnight with Aironi remaining bottom and still searching for a first win.
It could have been a different story had Ludovic Mercier put Aironi ahead in the opening exchanges with a simple penalty but he managed to send it wide.
The Frenchman did make amends soon after, only after Jones had kicked the Scarlets into an early lead though.
And it was the home side who enjoyed much of the first-half despite being guilty of indiscipline around the ruck.
Jones nudged them 6-3 ahead with another kick as it looked like scoring was going to be heavily dominated by kicking; Mercier went on to miss another chance.
But the breakthrough came on 29 minutes when Jonathan Edwards burst through the middle and off-loaded to Sean Lamont.
He was hauled down just short by Gilberto Pavan but the Scarlets were able to recycle and found full-back Fenby on the wing to go over.
Aironi threatened to reply immediately when Danwel Demas intercepted only to spill the ball, and he was to rue that error as two minutes before the break the Scarlets grabbed their second try.
That also came from a mistake, but the Welsh region exposed Aironi's weakness by using the wing, with 18-year-old North claiming his third try of the season.
Scarlets progress pleases Jonathan Davies
Jones missed the conversion but took just 30 seconds after the restart to extend the Scarlets lead to 21-3 when the visitors were penalised for not releasing.
And it was to get better 10 minutes later from a line-up when Regan King brilliantly served the onrushing Davies to charge through the centre and go under the posts for a converted try.
The Italian side were clearly up against it and only got worse for them when flanker Erasmus was sin-binned for repeat offending.
Fenby should have added his second try from a scrum but snatched at the ball and knocked on yards from the line.
But the Scarlets put the game beyond doubt with the deserved bonus try through Wales centre Davies after good work by North to take a 35-3 lead.
Replacement scrum-half Roberts topped the 40-point mark with a converted try after exposing huge gaps either side of the ruck.
And it was all too easy by the end and Davies ran home his third try in the closing stages which Jones - who kicked 19 points in total - converted.
Aironi did manage to claim a consolation try in the closing stages through Nick Williams, but even that and Mercier's conversion was far too little, too late for the Italians.
Scarlets: Fenby, North, King, J. Davies, Lamont, S. Jones, Knoyle, I. Thomas, Rees, Manu, Reed, Day, McCusker, J. Edwards, Lyons.
Replacements: Priestland for Fenby (57), Maule for King (67), Roberts for Knoyle (60), John for I. Thomas (57), Owens for Rees (57), R. Thomas for Manu (57), Fa'amatuainu for Reed (67), Turnbull for J. Edwards (57).
Aironi: Laharrague, Demas, Pavan, Pizarro, Rubini, Mercier, Tebaldi, Perugini, Ongaro, A. De Marchi, Del Fava, Geldenhuys, Erasmus, Krause, Williams.
Replacements: Canavosio for Tebaldi (44), A. De Marchi for Perugini (53), Ferraro for Ongaro (53).
Not Used: Redolfini, Furno, Benatti, Venditti, Bocchino.
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