SYSTEMATIC REVISION OF THE AUSTRALIAN THORNBILLS 117 
Subspecific Characters. — Resembling sandlandi and leachi but altogether 
paler. Upper surface citrine-drab with nape light greyish olive; under sur- 
face white, tinged deep olive-buff. 
Specimens from western New South Wales are lacking, but 
those from south Central Queensland, north-west Victoria, 
and the adjoining area of South Australia are clearly refer- 
able to one subspecies. As this bird is only an occasional 
visitor to north-central Queensland, it is probable that the 
specimens from which normantoni was described were forced 
north by dry conditions. Whether normantoni is to be 
referred here or to f ordinandi is not clear. 
AcantMsa chrysorrhoa f ordinandi (Mathews). 
Acanthiza pallida Milligan, Emu, iii, 1903, p. Ill; Yalgoo, Western 
Australia. (Not Acanthiza pallida Finsch, Notes Leyden Mus., xx, 
1898, p. 347). 
Geobasileus chrysorrhoa ferdinandi Mathews, Bull. Brit. Ornith, Club, 
xxxvi, 1916, p. 90; Musgrave Ranges, Central Australia. 
Geobasileus chrysorrhoa atexanderi Mathews, Aust. Av. Rec., iv, 1921, 
p. 137; new name for Acanthiza pallida Milligan. 
Geobasileus chrysorrhoa pallescens A. G. Campbell, Emu, xxii, 1922, 
p. 65 ; Levi Ranges, Central Australia. 
Geobasileus westcrnensis A. G. Campbell, Emu, xxii, 1922, p. 65 ; 
Moora, Western Australia. 
Range. — Extreme western Queensland, and probably north-western New 
South Wales, west through Central Australia to inland mid-western Australia. 
Specimens Examined. — Ten from the following localities: Central Aus- 
tralia : Macdonnell Ranges, Hermannsburgh, James Ranges (type of palles- 
cens). Western Australia : Ebano, Yandanooka, Wongan Hills. 
Measurements. — Ten adult specimens of both sexes: wing, 56-62 (54- 1) ; 
tail, 39-44 (41); exposed culmen, 10-11 (10 3); tarsus, 16 5-18 (17 4). 
Subspecific Characters. — Much paler in colouration than any other race of 
chrysorrhoa. Similar to the typical form in its yellowish under surface and 
yellow under tail-coverts. Dorsal surface from light greyish olive on nape 
to yellowish citrine on lower back ; under surface white, suffused straw 
yellow, except on chin and throat, and tinged cartridge buff on breast ; under 
tail-coverts barium yellow. 
Although the species is common in coastal areas it would 
seem, from the small number of the preceding and present 
races available, that such is not the case in the dry interior. 
Except that the breast is more deeply tinged cartridge buff, the 
type of pallescens is similar to other specimens from central 
and inland Western Australia. The single example from 
Wongan Hills in its darker upper parts reflects the proximity 
of that locality to the range of A. c. multi , and it is apparent 
that G. c. westernensis was described from a similar specimen. 
