The Gray Mourners are a sapient arachnid-like species with ten limbs, multiple eyes and narrow torsos. They display a clear case of sexual dimorphism, with the females being twice as large and usually accompanied by two or more males. Their jaws are able to disjoint like a snake's, allowing them to swallow large quantities of food. To consume liquids, they instead extrude a snorkel-like tube from their mouths.
- Smut Talk (2000)
- The Convergence of the Old Mind (2002)
- Chrysalis (2002) (Mentioned only)
- The name of this species is in reference to a real life type of spider, the infamous black widows.