There can be little doubt that Walckenaer (1837) actually had before him Latreille's specimen from somewhere near Philadelphia when he described the species again as Sphodros milberti.

In retrospect, it seems almost certain that the names rufipes, bicolor, and milberti were all based on the same specimen, a male sent as a gift to the Paris Museum by M. Milbert sometime before 1829 (emphasis added).

    Paraphrased from Gertsch and Platnick (1980).

The females, which do not generally leave their silk tubes, have no such color on their decidedly shorter legs, and tend to be more of a dark brown than the black seen on the males.

The purseweb is usually built vertically up the trunk of a small tree. The web is often adorned with debris, helping to camouflage it. The species is often found in forested areas with sandy loam soils. (Rose, 2022)

Gertsch, W. J. & Platnick, N. I. (1980). A revision of the American spiders of the family Atypidae (Araneae, Mygalomorphae). American Museum Novitates 2704: 1-39