In Maryland, six contests for seats in the U.S House are of special concern.

In the First District, Democrat Roy Dyson deserves reelection. He has worked to improve the fragile economy of his Eastern Shore/Southern Maryland district and he has helped in the development of a "common market" to attract business to this Mid-Atlantic region. His Republican opponent, businessman Harlan Williams, has failed to demonstrate any case for replacing him.

In the Third District, Democratic incumbent Barbara A. Mikulski has represented her Baltimore City/County and Howard County district ably and enthusiastically. Her Republican opponent, Dr. Ross Z. Pierpont, cannot come close to matching her experience and effectiveness.

In the Fouth District, Republican incumbent Marjorie S. Holt is running for a seventh term, still an unflagging supporter of military spending but not of much else. Though her base is Anne Arundel County, she has not gone out of her way to assist the Greater Washington caucus on regional issues. Her Democratic opponent, Howard Greenebaum, cannot match Mrs. Holt's experience, but he presents a refreshing alternative. He has the endorsement of nearly every key member of his party in the state, including that of Gov. Harry Hughes and top officials in Prince George's and Anne Arundel counties. The district deserves a more comprehensive representation -- and Mr. Greenebaum should be given a chance to provide it.

In the Fifth District, Democrat Steny Hoyer has risen swiftly and deservedly in the leadership ranks of the House and has been an effective spokesman for the interests of his district and state. His Republican opponent, John E. Ritchie, is no match.

In the Sixth District, Democratic Rep. Beverly Byron continues to demonstrate interest in issues ranging from defense to finance to energy. She should enjoy bipartisan support for two reasons: 1)she frequently crosses party lines to serve her constituents, and 2)her Republican opponent is Robin Ficker, whose self-serving, often mischievous maneuvers in the Maryland House of Delegates have infuriated members of his own party and others who have had to work with him on legislative matters.

In the Eighth District, Democrat Michael Barnes continues to be this region's most able member of the House on national as well as local issues. He is informed, effective and keeps in close touch with constituents in all corners of this diverse district. Neither Republican Albert Ceccone nor Libertarian Samuel Grove offers a worthy challenge.