Wow, that's a neat one! Do you have any angles that show the front of the face? If the clypeus (the area beneath the eyes where a mustache would go) is all white, it's probably D. albineus, instead. Like this one:


Otherwise, it could just be a white form of D. tenebrosus (which would be my first guess) or D. scriptus, my next guess.

Looking back at the photos and the accounts of the three specie, I tend to think albineus. It seems like I can see the white across the clypeus on the enlarged photo. The marks on the dorsal surface of the abdomen also seem to be more of a curve rather than the W shape of the other two. It is also closer in size and is shown in FL. What do you think?

After looking more closely at the enlarged image, I think I see white across the whole clypeus, too. I'd say D. albineus for sure then. That species often has those thick white hairs all over the legs and body, too, so that helps cement that ID even more. I would say move 'im on over. :-) Great shots!