Abstract
The generic and sub-generic classification of the New World jays employed by Blake (in Mayr and Greenway 1962:206-228) perpetuates a system largely similar to that of the earliest authoritative works on New World birds (e.g., Sharpe 1877). Blake does submerge Uroleuca Temminck and Xanthoura Nelson, which were still recognized by Hellmayr (1934:29, 30) but does not follow recommendations for mass lumping of genera proposed by Amadon (1944a). Phillips et al. (1964:106) have since also recommended large scale amalgamation of genera in this assemblage. Amadon's recommendations were premature; information on these jays gathered and published during the past two decades has negated some of his conclusions. Phillips et al. and Phillips (1966:110-112) are obviously aware of the accumulated knowledge on general biology, behavior, and vocalizations, especially on the previously almost unknown Neotropical species, but do not provide taxonomic revision of genera taking consistent account of this knowledge. The remarks of Phillips et al. (1964:106) supporting their proposed merger of genera are differentiated from the earlier statement
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