An article in last week's Weekly incorrectly described the seat Jim Krehely is campaigning for in District 22. Krehely, 25, a Republican, is running for House of Delegates. Also, the story misstated the former job of candidate Anne MacKinnon. She was a staff caseworker in the office of Rep. Steny H. Hoyer (D-Md.) for three years.

When longtime Maryland Del. Frank B. Pesci decided to work for the gubernatorial campaign of Maryland Attorney General Stephen H. Sachs instead of seeking reelection, an interesting twist was added to the race in the 22nd Legislative District of Prince George's County.

Who, political observers wondered, would the two remaining incumbent Democratic delegates, Richard Palumbo and David Bird choose in the New Carrollton Democrat's place as the third candidate on their "team" for the Sept. 9 primary? A total of seven Democrats is vying for the three seats and the chance to face Republican Jo Mimms-Bolden in the November general election.

The answer is Andrew C. (Andy) Hanko, 56, the genial mayor of New Carrollton. Together, Palumbo, Hanko and Bird form a slate that supports gubernatorial candidate William Donald Schaefer, although Bird had, until recently, supported the Sachs campaign. Palumbo insists that the tie to Baltimore Mayor Schaefer is "secondary."

"The important thing is that, together, we bring a mixture of qualities that complement each other," said Palumbo, 47, a lawyer who was the top vote getter in the 1982 primary. "David is a little more highbrow about issues -- tax concepts, the broad issues.

"I've been interested in specific tax matters and, as a former prosecutor, the area of law enforcement. Andy is a quiet, laid-back-type fellow -- he may be viewed as somebody who brings a lot of expertise in municipal areas."

The other candidates hoping to thwart that team are Cheverly City Council member Francis H. George, a radiologist and former president of the Maryland Municipal League; Marion Marie Hoffman, a Bladensburg Town Council member who is making her third bid for a delegate seat; Anne MacKinnon, an active political campaigner and volunteer caseworker in the office of Rep. Steny Hoyer (D-Md.) for three years, and Paul Pinsky, president of the 6,000-member Prince George's County Teachers Association.

District 22, located in the northwestern section of the county near the D.C. line, includes Hyattsville, Bladensburg, Riverdale, New Carrollton, Landover Hills, Edmonston and parts of Cheverly. The population -- 23 percent of which is black, Hispanic or Asian -- is a mixture of middle-income professionals, blue-collar workers and University of Maryland employes.

It is "a good piece of middle America," Palumbo said.

Thomas Patrick O'Reilly, the state senator for the district since 1975, is unopposed in the Democratic primary. O'Reilly, 47, vice chairman of the Senate Finance Committee, faces Republican Jim Krehely, 25, a University of Maryland senior, in November.

The candidates describe the race as low key, with a heavy emphasis on door knocking and other neighborhood campaigning. The major issues include the impact on state services of the Gramm-Rudman-Hollings deficit reduction law and other federal policies, the high cost of health care and liability insurance, and education.

"People are, as we're finding, generally content," said Bird, 40, a lawyer who has served in the House of Delegates since 1979. "Unemployment is way down, the economy seems to be strong . . . . It's the luxury of the incumbent, I guess, to wait for the challengers to raise the issues."

Aside from an obvious interest in more aid to education, Pinsky, who has headed the local teachers union for three years, is concerned with improvements in social services, putting limits on big banks and insurance companies and shifting more of the tax burden to industries and corporations. Pinsky, 36, who has been endorsed by the state branch of the AFL-CIO and the Citizen Action Coalition, a state consumer group, describes himself as "a people's lobbyist."

MacKinnon, 30, a New Carrollton native, is director of sales for Ramada Central in the District of Columbia, a member of the county's Human Relations Commission and a supporter of the Sachs campaign.

She lists education and state income tax reform as among her most important concerns, but emphasizes that she has "a strong enough business background to know you have to account for the money and the programs, too."

Marion Hoffman, a longtime Democrat who has served on the state central committee, speaks about specific problems of the elderly and the often neglected communities inside the Capital Beltway.

"Schools are very important as we try to locate businesses in the area," said Hoffman, 52. "We also have to deal with the problems of crime so people feel safe in their communities."

In his campaign, Francis George, 36, is drawing on his experiences as a Cheverly City Council member and as former head of the state municipal league, which represents 155 cities and towns.

He was a chairman of the commission that successfully worked to modify TRIM, a controversial tax-limiting law that had been originally cosponsored by Bird, and is chairman of a future planning committee for the county's magnet schools program.

Hanko, an electrician and part-time real estate salesman, describes himself as "a people's person. I hope to bring some of that down to Annapolis."