RICHMOND, Va. (AP) _ December general fund revenues brightened considerably for Virginia. Gov. Terry McAuliffe’s office announced Monday that revenues increased 13.1 percent last month from the previous year. The growth was primarily in payroll withholding and an extra deposit day, among other factors. On a fiscal year-to-date basis, total revenue collections rose 6.8 percent. That’s better than the revised annual forecast. McAuliffe called the December numbers a strong showing. He said it signals gradual improvement to the state’s economy.