It took Maggie Hart's mom until the final regular season home game of her daughter's college career to finally watch her play lacrusse.

And it took Maggie Hart just 11 seconds yesterday to show her mom what she's been missing.

Because by then, the Harvard women's lacrosse squad's biggest star had put the Crimson on the road to success and had showed her mom what the fuss they called "lacrosse" was all about.

When the Crimson's senior captain followed up her first goal of the day yesterday with another just 27 seconds into the game. Harvard had a 2-0 lead over Boston University, and Hart had a quick pair of goals.

By the time it was all over, Harvard had snagged a 21-5 Terrier thrashing in its final regular season home game of the year, and Hart had tallied an easy five goals.

Along the way, a couple of no-names nicely found their ways into the scoring book in a game that produced the Crimson's most goals of the year and became Harvard's ninth straight win of the year.

The Soldiers Field win upped the Crimson's record to 9-1 and set the stage for The Game Saturday in New Haven. The Ivy League's only two undefeated teams. Harvard and Yale will be fighting for the upper hand in the race for the 1984 league crown and the accompanying NCAA tournament berth.

But even without an Ivy title, the Harvard squad would seem destined for an automatic tourney invitation. After a season-opening loss at number-two ranked Maryland, the Crimson has reeled off nine straight wins and, in the past week, has become somewhat of a scoring machine.

Harvard followed up a 15-0 pasting of Brown last Wednesday with an 18-5 shellacking of Cornell last Friday. But those easy wins paled in significance next to yesterday's cakewalk in the mud.

Slip. Sliding away all over Soldiers Field, the Crimson manhandled a B.U. squad many had thought would he a good test before Saturday's showdown.

Harvard's only real test yesterday, though, came in avoiding the puddles the rain had left from the day before.

The game was never in doubt, and only a 14 minute Crimson scoring drought in the first half kept Harvard from setting a new record for most goals in a game. The 21 yesterday were six short of the club record, set last year against Towson State.

But with last week's Ivy massacres in hand and yesterday's drubbing of the cross-town Terriers, Harvard is peaking at just the right time.

"We're gotten so much continence from these last three games," said sophomore Alicia Clifton, who picked up a bunch of confidence herself with four first-half goals yesterday.

"But this was just a rehearsal for Yale," she added.