The alleged attack happened back on April 15th around 9 a.m. at the Forest Hills 71st Avenue subway station.
Investigators released new video of the suspect on Monday. You can see her carrying the child and pushing a stroller.
Police say she and the 53-year-old woman bumped into each other as she was exiting the train.
The suspect then re-entered the E-train and allegedly punched the woman in the face.
The suspect is described as a light-skinned female, approximately 30-years of age, last seen wearing a white baseball cap, pink shirt and dark pants, pushing a stroller and carrying an infant.
Anyone with information in regard to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).
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