Wheeler (1934) described fulvus and a subspecies sublucidus from three collections from Barro Colorado Island, Panama. Stefan Cover (pers. comm.) examined the types of both and can find no significant differences; the three collections are almost certainly from the same population. Cover also compared the fulvus types to the images on this page, and confirmed their gross similarity.
Wheeler reported that his three collections were all from "flat carton sheds with coccids on the bark of living trees." Ward's collection was of four workers on low vegetation, 0.5-2m above the ground. Longino's collection was from a carton nest under a live leaf of Cardulovica (Cyclanthacaceae), at the base of the blade and sheathing the upper portion of the petiole.