The bandit was on a winning streak for a month, starting around Christmas, but a month later to the day was the last success of his spree: four attempts, from January 25 to February 7th, resulted in no cash. "All the robberies were 'note jobs,'" the Times reports, "meaning that the robber handed over a demand note but never brandished a weapon."
So it seems he took some time off. But in late June, he appears to have decided to try his luck again, hitting a Chase in Bensonhurst and getting $2,000. Since then, he has robbed four other banks—two Chases and two Capital Ones. I suggested earlier this year that the robber may have had a vendetta against Chase, but though that bank makes up the majority of the locations he has hit, he has visited other banks as well. It's actually probably just a result of that chain's damn ubiquity.