It was a departure from the standard fare of upcoming meeting notices, minutes of past sessions and updates on neighborhood concerns. The president's welcome in the monthly newsletter of Montgomery County's Allied Civic Group contained this missive: "Perhaps the first thing I ought to say is 'NO, I DIDN'T DO IT!' But perhaps we should skip it, since, as the British say, 'Everything is "sub judice." ' "

The newsletter was penned by Allied President Joan Ennis, the Silver Spring civic activist who County Council member Rose Crenca has accused of offering her money to limit development in the Silver Spring downtown. The Maryland state prosecutor is looking into the charges, which Ennis has flatly denied and on which she is not commenting these days. "Sub judice" means under judicial consideration.

Speaking of Crenca, there was a vivid demonstration last week of why some Democratic pols thought the council's lone female member would have made a good candidate to oppose Rep. Constance A. Morella (R-Md.). Both Morella and Crenca showed up at the County Chamber of Commerce's reception for lawmakers in remarkably similar purple dresses.

The theory behind a Crenca candidacy was that only someone like the popular incumbent had a chance of beating Morella. The purple attire helped highlight the similarities between the women -- both were teachers, both are longtime county residents, both raised children, both are personable and quotable, both are short and both are Italian-Americans.

Morella joked that if Crenca had been her opponent, the two probably would have ended up debating linguine. Only, Morella said, she would have had to ask her husband Tony, renowned for doing the Morella cooking, to pinch hit. Indeed, Crenca chimed in, that's one of the big differences between her and Morella -- "she doesn't cook."

Crenca's husband James, on the other hand is reputed to be -- by Crenca -- notoriously inept at any household chores. And, it was partly because of her husband's lack of enthusiasm for a campaign that Crenca eventually bowed out of a congressional run.

Gov. William Donald Schaefer was honored by the National Women's Political Caucus last week for his appointment of women to key positions in state government. Schaefer ranked fourth in the nation and told the women's group that he wants to become number one.

But first he has to become number one in the region.

Virginia Gov. Gerald L. Baliles ranked second in the study of how governors appointed women to head key state agencies. Four of the nine department heads working for Baliles were women, according to the study. Women headed five of the 15 key agencies in the Schaefer administration.

Number one? Democratic Gov. Edwin W. Edwards of Louisiana, who has appointed women to head seven of the 11 agencies under his control. Of the female governors, Democrat Madeleine M. Kunin of Vermont was ranked third and Republican Kay Orr of Nebraska was ranked 16th.

Walter H. Petrie and Chuck Lapine, the McLean developers who want to transform the old Hecht's building in Silver Spring into a $100 million retail, entertainment and office complex, were explaining to the county Planning Board last week why they thought they could make a go of it. Sure, retail deteriorated in Silver Spring, they argued, but not because the market deteriorated. Retailers just didn't devise the right "mousetrap" for the market. It was a metaphor they repeated throughout their presentation and that Planning Board Chairman Norman L. Christeller gently brought them to task for.

Those who watched last fall's ferocious debate over development in Silver Spring, Christeller said, "know that the people of Silver Spring are not mice."

Howard County pianist Deanna Bogart is taking her "boogie woogie" style on the road again, only this time the road leads to San Diego. There, as part of the Radio City Music Hall Super Bowl XXII halftime extravaganza, she'll be pounding out tunes such as "Super Bowl Twist" along with Chubby Checker and 87 other tuxedo-clad pianists while a group of Rockettes struts across a piano-shaped stage. The 28-year-old Glenwood resident, who at age 6 was expelled from New York's Conservatory of Music for refusing to read music, landed a spot in the show after an audition at Radio City Music Hall last month.

Stage fright isn't something that Bogart spends too much time worrying about. She's accustomed to crowds of 75 or 100 that pack area clubs regularly to hear her interpretations of vintage pieces that blend the styles of big band and rock 'n' roll and become boogie woogie. But how does the idea of playing before millions in the most-viewed television program of the year strike her? "It's awesome," she said. "A once in a lifetime event."Murphy Reminds Schools of Work That Remains

In the afterglow of hype and hoopla surrounding President Reagan's visit ot Suitland High School last week, Prince George's School Superindent John A. Murphy has sounded a "cautionary note" to teachers, principals and employees.

Reagan and the national press corps descended on the highly touted magnet school for an assembly that was carried on network news shows. Reagan used the occasion to announce his support for increased funding of magnet schools. The Suitland students were honored and elated by his presence.

"President Reagan, {Maryland} Gov. {William Donald} Schaefer, {U.S.} Congressman {Steny} Hoyer and others last week described our school system as a model for the nation," Murphy said in a letter mailed this week to school employees, but Suitland High School "is not our only success story..."

And lest they get swept up in the parade of praise heaped on the system, Murphy wrote, "I offer a cautionary note because I also know that so much more needs to be done. A quick turnaround for a school or a school system only means the achievement of one level of success in the task of renewal. We must be ready for the new problems even as we solve the old ones."