FACTBOX: Ingredients for new economic stimulus

WASHINGTON (Reuters) - Democrats in Congress say they will try to advance a second bill in September to stimulate the economy, following up on the $152 billion jolt being spent this year.

So far, the Bush administration has said another stimulus bill is unnecessary. But House Speaker Nancy Pelosi says she has not heard a "no, never" from Bush's fellow Republicans in Congress.

In recent weeks, Pelosi has mentioned a $50 billion price tag; Senate Appropriations Committee Chairman Robert Byrd this week unveiled a $24 billion plan.

Here are some of the initiatives that could be in the Democrats' next stimulus proposal:

* TAX REBATES: Most of the first stimulus law centered on refunds the Internal Revenue Service has been delivering since May to encourage consumer spending.

Pelosi on Thursday said another round of tax rebates is "on the menu." She added: "We're talking about how much and how much difference would it make and how would it be distributed; would it be in the same progressive way as we did before." But she was quick to add that other "investments" were essential.

* INFRASTRUCTURE IMPROVEMENTS: Nearly $3.6 billion would be spent under a plan by Senate Appropriations Committee Chairman Robert Byrd to rebuild dilapidated bridges and roads. Democrats claim the projects for roadbuilding and other investments would quickly generate 124,000 jobs.

* AID FOR THE POOR: Expanded food stamps and other nutrition programs to help low-income families at a time of rising food prices and expanded aid for the poor to pay this winter's rising home heating costs.

* DISASTER AID: More help for states hit by flooding in the Midwest and other natural disasters, such as the 2005 Hurricane Katrina and western wildfires this year. About $10 billion was sketched out by Byrd.

* MISCELLANEOUS: Money to help states and cities buy foreclosed properties; more spending on energy, health and science research; more for law enforcement, including fighting illegal drugs on the U.S. borders. House Republican leader John Boehner on Thursday accused Democrats of using a new stimulus bill to deliver "federal largess," that he said would be "just a big waste of taxpayer dollars."

(Reporting by Richard Cowan; editing by Gary Crosse)