In accord with AOS-SACC (Proposals 780 and 781) and AOS-NACC (Chesser et al. 2020b), the sequence of hummingbirds in the group previously listed between Chlorostilbon and Hylocharis is revised, based primarily on McGuire et al. (2014) and Hernández-Baños et al. (2020). In accord with AOS-NACC (Chesser et al. 2020b), change the scientific name of Dusky Hummingbird from Cynanthus sordidus to Phaeoptila sordida (Stiles et al. 2017a, b), based on genetic evidence that the traditional genus Cynanthus is not monophyletic (McGuire et al. 2014, Hernández-Baños et al. 2020).