The valid spelling is leucotelus.

Original description: Napata leucotelus. Butler, A. G., 1876. On the subfamilies Antichlorinae and Charideinae of the Lepidopterous Families Zygaenidae and Arctiidae.. The Journal of the Linnean Society of London. Zoology. 12: 409.

The species is previously mentioned as a variety of terminalis at https://www.biodiversitylibrary.org/page/39418230 but without a name.

See also http://mothphotographersgroup.msstate.edu/species.php?hodges=8271.7