Order PASSERIFORMES. 
No. 538. 
Family SYLVIIDjE . 
MILLIGANIA ROBUSTIROSTRIS. 
THICK-BILLED TIT. 
(Plate 451.) 
Acanthiza robustirostris Milligan, Emu, Vol. III., pt. 1, p. 71, July 1, 1903 : Day Dawn, 
Murchison, West Australia. 
Acanthiza robustirostris Milligan, Emu, Vol. III., pt. 1, p. 71, 1903; id., ib., p. 102; 
Campbell, ib., p. 237, 1904 ; Emu, Vol. IV., p. 147, 1905 {re North’s omission) ; 
Hall, Key Birds Austr., 2nd ed., p. 112, 1906; Mathews, Hand! Birds Austral., 
p. 75, 1908; Whitlock, Emu, Vol. IX., p. 197, 1910; Mathews, Nov. Zook, Vol. 
XVIII., p. 349, 1913; Howe, Emu, Vol. XVI., p. 175, 1917 (Review). 
Milligania robustirostris Mathews, List Birds Austr., p. 217, 1913 ; Howe, Emu, Vol. 
XVII., p. 56, 1917 ; Campbell, Emu, Vol. XIX., p. 162, 1920 ; Mathews, ib., 
Vol. XX., p. 31, 1920. 
Acanthiza mariance S. A. White, South Austr. Omith., Vol. II., pt. 2, p. 45, April 1915 : 
Moorilyanna, Everard Ranges Central Australia, ; id., Emu, Vol. XIV., p. 188 ; 
id., Emu, Vol. XVI., p. 158, pi. xxxnr., 1917 ; Howe, id., p. 175, footnote ; 
Campbell, id., Vol. XIX., p. 162, 1920. 
Milligania robustirostris liberia Mathews, Austral. Av. Rec., Vol. III., pt. 3, p. 61, April 7, 
1916 : Liberia Soak, West Australia*. 
Milligania robustirostris moorilyanna Mathews, Bull. Brit. Ornith. Club, Vol. XXXVI., 
p. 90, July 7, 1916 : Everard Ranges, Central Australia. 
Milligania robustirostris mariance Mathews, Emu, Vol. XX., p. 31, 1920. 
Distribution. Central Australia, mostly western. 
Adult female. General colour of the upper-surface dusky-grey including the top of the 
head, back, and wings ; the feathers of the bastard-wing, median and greater upper 
wing-coverts and primary-coverts centred with dark brown ; inner webs of flight- 
quills dark hair-brown with whitish margins to some of the feathers ; rump and 
upper tail-coverts chestnut ; tail blackish with smoke-brown tips to the feathers 
which are more or less white, or buffy- white on the inner-webs ; sides of face and 
fore-part of head speckled with grey and white ; throat dull white ; eyelids greyish- 
white ; breast vinous-grey like the under wing-coverts ; abdomen cinnamon-buff ; 
lower flanks and under tail-coverts white ; thighs dusky, ; under-surface of flight- 
quills hair-brown with buffy-white margins ; lower aspect of tail blackish-brown 
* This is the bird mentioned by North, Austr. Mus. Spec. Cat. No. 1, Vol. I., p. 280, under A. uropygialis. 
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