TREE-TIT. 
recognisable, and have since been admitted and even added to in number by 
local workers. The diagnoses of the forms read : 
Smicrornis brevirostris brevirostris (Gould). 
New South Wales. 
Upper-surface coloration olive ; under, pale citron -yellow. Fully described 
as to pattern previously. 
Smicrornis brevirostris pallescens Mathews. 
Queensland. 
Differs from S. b. brevirostris in its much paler coloration above, and 
lacking the yellow under-surface of S. b. flavescens. Type locality : Inkerman, 
Queensland. 
Smicrornis brevirostris subflavescens Mathews. 
Eastern Interior Northern Territory. 
Differs from S. b. flavescens in its paler coloration, and from S. b. rogersi 
in its much greener under-surface, with the rump decidedly paler. Type 
locality : Alexandra, Northern Territory. 
Smicrornis brevirostris flavescens Gould. 
Western Northern Territory. 
Upper-surface bright yellowish-olive ; under-surface bright yellow. 
Smicrornis brevirostris melvillensis Mathews. 
Melville Island, Northern Territory. 
Differs from S. b. flavescens in its much brighter yellow under -surface. 
Smicrornis brevirostris rogersi Mathews. 
Coastal Nortli-west Australia. 
Differs from S. b. flavescens in its general coloration, resembling more 
S. b. occidentals, from which it is differentiated by means of its lighter throat, 
greyer head, and paler rump. Type locality : Napier Broome Bay, North-west 
Australia. 
Smicrornis brevirostris mungi Mathews. 
Interior North-west Australia. 
The palest form of Smicrornis yet discovered as regards the upper-surface 
coloration, and distinguished from S. b. rogersi, its nearest subspecies, by 
its brighter yellow under -surface. Type locality : Mungi, Interior North-west 
Australia. 
Smicrornis brevirostris occidentals Mathews. 
South-west Australia. 
Differs from S. b . viridescens in its yellower under-surface and yellow- 
green upper-surface, therein approaching S. b. brevirostris, but brighter even 
than in that form. Type locality : Broome Hill, South-west Australia. 
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