Ray Sanchez, 31, of Coram, who is a level two sex offender, is charged with three counts of endangering the welfare of a child, exposure of a person and public lewdness.
It happened Sept. 3 while the teen was out riding her bike on Hicksville Road near Thorne Avenue in North Massapequa.
A passenger on the subway who witnessed the June 3 incident took a cell phone video of the man.
A man has been arrested and charged with exposing himself to a teenage girl in a Suffolk County mall parking lot.
Police Wednesday were looking for a man who flashed a woman on a subway train in Midtown last month.
A 54-year-old man was arrested in Suffolk County this weekend, after people spotted him engaged in acts of public lewdness in two libraries and a bookstore.
Authorities said one woman was able to record the lewd act on video before she exited the train.
The incident happened on Wednesday, police said, when Joseph Theodore, 52, allegedly exposed himself and touched himself on a southbound 2 train at the Atlantic Avenue station in Brooklyn.
Anyone with information in regard to the incident is asked to call Crime Stoppers at 1-800-577-TIPS (8477).
The man allegedly exposed himself to a woman around 6:20 p.m. Tuesday at the intersection of 60th Street and 43rd Avenue, police said.
A 24-year-old woman was riding on a southbound 7 Train when one of the teens sitting across from her exposed himself and simulated a sex act to get her attention, authorities said.
Kyle Brown, 23, was charged after authorities said he boarded a train on April 18 and masturbated while staring at a 34-year-old woman.
Cops say just before 12:30 p.m. on Feb. 8, a man exposed himself to a woman and other passengers while on a northbound 4 train at the 149 Street and Grand Concourse subway station.
Police say 41-year-old Andrew McFall was arrested in front of his home in Bronx on charges of public lewdness and endangering the welfare of a child.
Police say the man followed an 11-year-old girl down the street, exposed himself and then fled. The girl was not injured.