The valid spelling is fulva.

Original description: Kodiosoma fulva. Stretch, R.H., 1872. Illustrations of the Zygænidæ & Bombycidæ of North America, 1: 67; pl. 2, f. 7. https://www.biodiversitylibrary.org/page/9832589

See also: http://mothphotographersgroup.msstate.edu/species.php?hodges=8167