NEW YORK — A Greek man proved inept at the art of thievery by swiping a Salvador Dali painting from a New York City gallery as security cameras rolled and, in a panic, later trying to send it back anonymously, authorities said Tuesday.

Phivos Istavrioglou also left fingerprints that helped detectives track him down – another misstep in a botched fine art caper that even he found foolish, according to an account of a confession contained in court papers.

The second Istavrioglou walked out of the Upper East Side gallery last summer with the Dali watercolor and onto Fifth Avenue, he "was scared and couldn't believe what a stupid thing he did," the papers say.

Istavrioglou, 29, of Athens, pleaded not guilty Tuesday to grand larceny during a brief court appearance in Manhattan where a judge set bail at $100,000. His attorney had no immediate comment.

Prosecutors accused Istavrioglou of stealing "Cartel de Don Juan Tenorio" in broad daylight while visiting New York in June. After pulling it off the wall, he stashed it in a shopping bag and flew with it back to Athens, authorities said.

"It was almost surreal how this theft was committed – a thief is accused of putting a valuable Salvador Dali drawing into a shopping bag in the middle of the afternoon, in full view of surveillance cameras," District Attorney Cyrus R. Vance Jr. said.

Shortly learning authorities had distributed security photos of him that were seen around the world, Istavrioglou took the $150,000 work out of its frame. He then rolled it up in a cardboard tube – "in a manner befitting a college dorm poster" – and mailed it back to New York without a return address, said prosecutor Jordon Arnold.

New York Police Department detectives lifted fingerprints from the shipment that matched one from a juice bottle that they say Istavrioglou shoplifted last year from a Whole Foods market, giving them a name, said Police Commissioner Raymond Kelly. An investigator posing as an art gallery owner later tricked Istavrioglou into returning to New York by offering him a possible position as a consultant.

Federal agents intercepted Istavrioglou at John F. Kennedy International Airport on Saturday. While speaking to detectives that afternoon, court papers say, he "indicated he knew the theft would catch up to him and wants to make (the) situation right."