Manhattan

This bald-headed punk is wanted for mugging four elderly men in Greenwich Village, Gramercy and Stuyvesant Town since the end of last month, police said.

The suspect approaches his victims as they enter residential buildings and takes their wallets.

The victims ranged in age from 62 to 91. None was hurt, although in the last two attacks, he pushed them to the ground. In one case, he made off with $800.

A small woman turned into a tiny terror — robbing and beating a man and threatening to stab cops, police said yesterday.

Wanda Brown, 34, who is 5-feet, 100 pounds, asked Luis Salazar, 36, if she could use his cellphone at First Avenue near East 28th Street at about 12:45 Saturday afternoon.

Salazar handed the phone to Brown, who pocketed it and snarled, “If you take $40 out of that automated-teller machine and give it to me, I will give you the phone back,” according to police.

Then Brown socked Salazar in the face, splitting his lip.

Police were called and arrested Brown, who allegedly told cops, “I am going to buy a big knife and come back here and stab you.”

Brown was charged with robbery and harassment.

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A man has been arrested for tampering with a credit-card device so he could use a computer for free in an Upper East Side store, authorities said yesterday.

Robert Papp, 28, allegedly damaged the $700 device to receive $108 in free computer time at the FedEx/Kinko’s on Lexington Avenue at East 78th Street at around 7:45 a.m. on July 4. After he left, another customer tried to use the computer, but noticed the device was broken.

Six days later, Papp was busted on charges of criminal mischief and theft of services, the DA’s office said.

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A knife-wielding man robbed a woman collecting cans in Murray Hill, police sources said yesterday.

Jozef Barrowski, 56, who lives in a homeless shelter, allegedly confronted the 48-year-old woman carrying nine bags of cans on East 34th Street near Second Avenue at 5:20 p.m. Thursday.

Barrowski grabbed one of the bags, pulled a knife and spewed, “I’m gonna hurt you if you don’t give me that bag,” authorities said.

Police were called and arrested Barrowski on a robbery charge.

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A teenage girl smashed a man in the head with a beer bottle after a night of heavy boozing at an Upper West Side restaurant, authorities said yesterday.

Mayra Felipe, 18, who had been drinking with the 31-year-old victim and a few friends, got into the fight at the Boat Basin Cafe on West 79th Street at 4 a.m. Thursday, sources said.

During the argument, Felipe allegedly grabbed the bottle and smashed the victim in the face. The victim staggered into the bathroom and slept there for several hours until he was discovered by a manager. A witness alerted cops and Felipe was arrested on assault charges the next day.

Brooklyn

A man who had been assaulted was found unconscious and clinging to life on a Bay Ridge street, police said yesterday.

The unidentified man was discovered with head injuries on 63rd Street at 11th Avenue at around 10 p.m. Sunday after police received a 911 call.

He was rushed to Lutheran Medical Center, where he was listed in critical condition.

Staten Island

Two would-be thieves were arrested for sticking up a woman at gunpoint in Port Richmond, authorities said yesterday.

Vincent Catty and Edwards Lagree, both 34, approached the woman as she headed to her car on Nicholas Avenue near Treadwell Avenue at 12:45 p.m. Saturday, cops said. Catty allegedly pulled a gun and announced, “I just got out of prison. Give me money.”

When the woman said she had none, Catty ordered her to withdraw cash from a bank. They drove in separate vehicles to the bank, where the woman told a worker she was being robbed.

The bank manager called 911 and the suspects were arrested, a spokesman for DA Daniel Donovan said.

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A motorcyclist was arrested after he led police on a wild chase through West Brighton, authorities said yesterday.

Police spotted Michael Brooks, 25, weaving his chopper in and out of traffic and crossing the double yellow line on Alaska Street near Henderson Avenue at 11:55 p.m. Friday, sources said. When the cops tried to pull him over, Brooks allegedly sped off, nearly hitting several pedestrians.

Police caught up with Brooks, who was slapped with various charges, including reckless driving, Donovan’s spokesman said.