Your original question, "Is there any
hidden allusion in Ada to the Addam's Family series," was answered
by the information about the time problem. The question of whether Ada
makes any reference to the New Yorker cartoonist Charles Addams and his
characters (never called by him "the Addams Family" so far as I know) is another
question, and one perhaps deserving of a more thoughtful response than my
facetious one.
The cartoons are collected in books, but I haven't seen
one in years. I do recall a favorite pair, however. In both Uncle Fester (as he
was called in the TV program) is in a crowded movie theater which we see from
the screen's point of view. In the first the audience is having a hilariously
good time and "Uncle Fester" is in tears; in the second the audience is weeping
and he is the one having the laughs.
Nabokov's humor, like Charles
Addams's, has it's dark side, and there certainly are references to cartoons in
Nabokov's works so the question is a good one. Apparently no one else has
written on this question, so you might pursue it a bit yourself. The place
to start would be to locate some of the the original cartoons and see what you
can find.
Happy hunting! Carolyn
p.s. A search of the Internet
revealed that Charles Addams's estate has requested that none of his cartoons
appear on the Internet. But books of his cartoons are still available -- 264
copies of various books are for sale at this web site (some in
Europe): http://dogbert.abebooks.com/servlet/BookSearch