Okay, I'm pretty sure these are true, I have heard and seen them many times before, but who knows...
discontinued flavours:
chocolate (chocolate jello - gross, stick with the pudding) 1904-1927
Cola 1942-1943
Lemon-lime 1960's
Pineapple-grapefruit 1960's
strawberry punch 1960's
On the plus side, I *love* the sparkling ones, yummy!
Jello article - and history
By the by, it takes a
very long time for jello colouring to wash out of hair