Genus— WILSON A VIS. 
Wilsonavis Mathews, Austral Av. Rec., Vol. I., 
Pt. 5, p. 110, Dec. 24, 1912. Type (by 
original designation) : Psilopus fuscus Gould 1846 not 1838 = Wilsonavis 
fusca richmondi Mathews. 
Differs from Pseudogerygone in its very short, slender bill and very short, 
weak feet. The peculiarities of this form suggest the retention of this genus, 
as it appears to be separable from all the other “ brown Gerygones ” in its 
small and rounded wings in which the short second primary is exceeded by 
the secondaries in length. This is the character provided by Sharpe for his 
Pseudogerygone, wherein he included most of the Australian species, which, 
however, do not show this feature. 
The Myeaters are a difficult group of birds both as regards genera, species 
and subspecies. Thus the present is the southernmost on the eastern side 
of the pale-breasted group, which though it has not penetrated into Tasmania 
has arrived at New Zealand, and from there to the Chatham Islands, where a 
very large and distinct species has evolved, well meriting the generic distinction, 
Hapolorhynchus, allowed it by Reichenow. The yellow-breasted birds on the 
east coast have travelled just as far south. While doing so they also seem 
to have ranged along the north and west coast, but the wanderings of Pseudo- 
gerygone have not yet been even guessed at. 
Pseudogerygone was introduced by Sharpe for Gerygones with a short 
second primary, but the above is the only one which answers to this 
diagnosis. There seems to be a difference, so I am using the above name to 
keep this item under discussion until its relationships can be worked out. If 
it be lumped, the differences are lost sight of and probably a valuable fact 
ignored for years. 
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