To bring species nomenclature for Oncidiinae in line with a comprehensive phylogentic study based on multiple DNA sequences and patterns of morphological variation, we present additional name transfers: (i) Ada, Brachtia, and Mesospinidium into Brassia and (ii) Pachyphyllum and Raycadenco into Fernandezia. These changes in circumscription are necessitated by the lack of monophyly of Ada and Fernanadezia/ Pachyphyllum as demonstrated in phylogentic studies of DNA sequence data, plus these two sets of enlarged genera each share some morphological characters that are putative synapomorphies. Raycadenco could be maintained, but it exhibits the synapomorphies of Fernandezia/Pachyphyllum and differs only in its pollination syndrome, so in the interests of simplicity it seems better to include it in Fernandezia.