The size of two Northern Virginia law firms was reversed in an article yesterday about their pending merger. Thomas & Fiske has 65 lawyers; Hazel, Beckhorn & Hanes has 53.

An Associated Press report last week incorrectly stated the number of journalists recently laid off at the Houston Chronicle. Five news employes were among 47 workers laid off.

The affiliation of three candidates running against incumbents on the board of directors of the Montclair Property Owners Association in Prince William County was reported incorrectly in yesterday's Virginia Weekly. Three of the six challengers in Saturday's election -- Karen Trimbach, Richard Berry and George DeMarco -- are independents.

An article in the Business section yesterday incorrectly characterized the decline in 1986 profits for the Federal Deposit Insurance Corp., whose profits fell for the second consecutive year. It should have been made clear that 25 percent of the year's profits for the entire U.S. banking industry, not the FDIC, came from sale of securities. Even so, the industry's earnings declined last year for the first time in 25 years.

Because of an editing error, the Turning Tables column in Weekend today incorrectly lists the date of the annual Bartender's Ball at the Washington Hilton. It is Saturday night.