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-SACC (Proposal 781), change the scientific name of Purple-chested Hummingbird from Amazilia rosenbergi to Polyerata rosenbergi (Stiles et al. 2017a, b), based on genetic evidence that the traditional genus Amazilia is not monophyletic (McGuire et al. 2014).