Young grossa have whitish markings ...how much of these markings they retain after final molt and throughout their adult life seems to depend on the individual. So far (not enough real science behind this statement) I have not seen the possibility of keeping a morph line going ...though I finally have one grossa that has retain ALL of her juv markings and she has produced a couple of sacs. That gives me the opportunity to see if there is a greater percentage of marking retaining individuals within those broods. Tough part is, these damn things take forever to mature. I have one that I raised from egg sac that is going on a year and is still not mature.Sweet! Thanks, all.
Strangely enough, we caught one at work today hiding in the cobwebs underneath a rack we were moving (thought this one was a latro at first, too).
The one we caught today has a more subtle version of the abdomenal markings on the male featured in the Wikipedia article, but it's fatter and without distinct palps -- maybe an immature female?
I wonder if the first one (pictured) is gravid . . .