WHITE-WINGED TREERUNNER, 
Mr. J. P. Rogers has mitten : “At Marngle Creek only four small flocks 
were seen, while at Mungi they were rare. In most timbered localities in 
West Kimberley these birds are fairly numerous.” 
From Melville Island Rogers wrote : “Coopers’ Camp, Nov. 20th, 1911. 
T his species is rare here. I have only seen three or four small parties and 
these were usually in the tops of tall trees. On the north side of the island none 
were seen, and recrossing the island to the south again I crossed a lot of likely 
country but saw none. At Coopers’ Creek again on Jan. 20th, 1912, two small 
parties were seen. The parties seen at the island were small, never more than 
five or six birds. At Derby flocks of twenty were common and the usual number 
was about ten or twelve.” 
G. F. Hill wrote : “ A somewhat rare bird (in Kimberley), generally seen 
in small flocks of six or eight. The nesting season appears to be in June, in 
which month several partly built nests were found near the Drysdale River.” 
While my “ Reference List ” was being printed, North sent to England a 
description of a new species, Neositta mortoni, collected at Port Essington, 
Northern Territory, which he concluded differed from birds collected at Derby, 
North-west Australia, and which agreed with birds from Cloncurry, Queensland. 
In my “ Reference List,” which was published the week before North’s 
new species, I had ranged the White-winged Treerunners as forms of the 
Black-headed Treerunner and admitted 
Neositta pileata leucoptera (Gould). 
North-w r est Australia (Coast) 
giving Derby as type locality even as North had independently done. 
Neositta pileata rogersi Mathews. 
“ Differs from N. p. leucoptera in its paler coloration above. Mungi, 
North-west Australia.” 
North-west Australia (Interior). 
Neositta pileata subleucoptera Mathew r s. 
“ Differs from N. p. rogersi in being paler still and larger. Alexandra, 
Northern Territory.” 
Northern Territory. 
Shortly afterwards I received birds from Melville Island and named these 
Neositta pileata melvillensis. 
“ Differs from N. p. leucoptera in its shorter, thicker bill ” and added 
Neositta pileata mortoni North 
as the name for the Port Essington bird. 
However, when Witmer Stone examined the Gould collection in Philadelphia 
all the birds were labelled Port Essington, and it will be noted above that Gould 
only gave “ Cobourg Peninsula ” as its habitat, so that North’s name became 
VOL. XI. 
73 
