Cops on Sunday night released a picture of a Bronx bus rider who allegedly groped a teenage girl during rush hour last week, police said.

The white-bearded suspect allegedly approached a 15-year-old on the BX15 before exposing himself and grabbing her thigh, according to police.

He then fled the bus at 173rd Street and 3rd Avenue in Claremont around 5 p.m.

The teen escaped the situation unharmed, cops said.

Authorities were asking anyone with information to call the NYPD’s Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).