SUMMARYCrome, F. H. J. 1973. The relationship of the Helmeted and Yellow-tufted Honeyeaters. Emu 73: 12–18. The relationship betweenMeliphaga cassidixandM. melanopssubspecies are discussed on the basis of measurements of museum skins and of live individuals. The four separable populations—M. meltoni, M. melanops, M. gippslandicaandcassidix—form a cline shaped like a wishbone.Cassidixwas probably derived frommeltoni-like forms viamelanopsandgippslandica.Anomalous morphological features in several old skins ofcassidixare described and interpreted as genetic peculiarities of the kind found in small populations.M. cassidixshould be treated as a race ofM. melanopson the grounds that it is at the end of one arm of the wishbone and is linked tomelanopsby a discrete intermediate form,gippslandica.