Well been a few months. Not sure if my two newer widows have reached full adulthood yet or not. I forgot to keep track of the number of molts. I suspect they have passed through their penultimate molt, in which case I have two females. Pity one wasn't a male. Only took a photo of the one. They look very similar in color pattern and so saw no reason to traumatize both. Oh, and for those who were wondering which species they were ... I finally know.
I thought it rather neat that the borders on the stripes(?) have sort of a "crackled" look to them reminiscent of some painting styles or some types of glass candle containers and drinking glasses.