WASHINGTON — A veteran House member from Philadelphia, one of his staff members, a lobbyist and two others were indicted Wednesday by the federal authorities in connection with bribery schemes and the misuse of hundreds of thousands of dollars in federal, charitable and campaign funds.

The representative, Chaka Fattah, a Democrat, spoke with members of the executive and legislative branches in 2008 to help the lobbyist get an ambassadorship or appointment to the United States Trade Commission. In exchange for his efforts, the F.B.I. said, Mr. Fattah received $18,000 from the associate that had been disguised “as a payment for a car sale that never actually took place.”

Mr. Fattah, 58, who ran for mayor of Philadelphia in 2007, also took funds from his mayoral and congressional campaigns to repay his son’s college debt, the F.B.I. said. In that scheme, Mr. Fattah and his staff member had his campaign pay a political consulting firm, which in turn made 34 payments on the loan for about $23,000.

Mr. Fattah’s son, Chaka Jr., was indicted by the federal authorities in 2014 on fraud charges. The son has vigorously fought the charges and has contended he was collateral damage as the Justice Department tried to catch his father.