The Senate Democrats trumpeted their fundraising numbers with great fanfare yesterday, calling the $3.5 million they have on hand in their two committees (housekeeping and reporting) “historic” and noting it’s more than twice what they had in the bank in July 2008 – four months before they took the majority.

But a closer look at the Senate Dems filing reveals they bulked up their numbers with the help of some last-minute transfers from several members who are known for their fundraising prowess, as well as one lawmaker who is running to join the conference, but isn’t even a member yet.

On July 12 – one day after the July 11 cutoff date – Sen. Dan Squadron, one of the majority’s newer members, transferred $35,000 to the reporting committee.

On the same day Sen. Eric Adams sent in $20,000, Conference Leader John Sampson forwarded a whopping $250,000, and Assemblyman Mike Gianaris, who is running unopposed for the Queens seat Sen. George Onorato is vacting, transferred $100,000 into the coffers of the conference he’ll soon be joining.

On July 13, Onorato forwarded $25,000 and Senate Deputy Majority Leader Jeff Klein, who chairs the DSCC, wired over $100,000.

All told, that adds up to $536,000 worth of last-minute cash. (There was also a $5,000 transfer from Rep. Gary Ackerman’s campaign committee, which seems a little odd, until you recall that all the House members have a stake in who controls the Senate majority due to redistricting).

The Senate Democrats transferred out $144,500, including $130,000 to its newest member, Sen. Jose Peralta, who prevented expelled ex-Sen. Hiram Monserrate from winning back his seat; $9.500 to Sen. Shirley Huntley and $5,000 to Sen. Andrea Stewart-Cousins.

John McArdle, spokesman for the Senate Republicans, accused the Democrats of using the last-minute, post-deadline transfers to “artificially inflate” their final number “to make it appear they were doing better than they were.”

The Senate Republicans received some cash transferred from member accounts, too, although not nearly as much, and all of it came in long before July 11.

Sen. Roy McDonald sent in $10,000. Retiring Sen. Dale Volker ponied up $20,000. Sen Chuck Fuschillo gave $5,000, as did Minority Leader Dean Skelos. UPDATE: Apparently, I missed one: Assemblyman Will Barclay, who lost a 2008 special election to Democratic Sen. Darrl Aubertine, transferred $79,000.

The Republicans transferred $10,000 to Sen. Frank Padavan’s campaign committee, $5,000 to Anthony Como, who is challenge Democratic Sen. Joe Addabbo; and $35,000 to Assemblyman Jack Quinn, who is running for the seat Volker is vacating against Sen. Bill Stachowski, who first must fend off a primary challenge from Tim Kennedy. (Thanks for the correction in the comments section!)

Posting cash after July 11 is not illegal. Back in 2006, AG Andrew Cuomo received an opinion from the state Board of Elections that posting contributions all the way up to the July 15 reporting deadline is perfectly allowable.