92 SYSTEMATIC REVISION OF THE AUSTRALIAN THORNBILLS 
Acanthiza pusilla zietzi North. 
Acanthiza zietzi North, Aust. Mus. Spec. Cat., i, 1904, p. 271 ; Kanga- 
roo Island, South Australia. 
Acanthiza halmaturina A. G. Campbell, Emu, v, 1906, p. 141 ; Kangaroo 
Island, South Australia. 
Range. — Kangaroo Island, South Australia. 
Specimens Examined. — Twelve from the following localities : Queenscliff 
(type of zietzi), Vivonne Bay, Kingscote, and type of halmaturina labelled 
“Kangaroo Island.” 
Measurements. — Eleven adult specimens of both sexes: wing, 47-53 
(50 7) ; tail, 40-46 (44) ; exposed culmen, 8-10 (8 9) ; tarsus, 18-20 (19). 
Subspecific Characters. — Darker throughout than any other race of pusilla. 
Dorsal surface suffused dark greyish olive and the flanks greyish olive to 
drab. 
The dull, dark colouration of zietzi makes it an easily 
recognized race. 
Acanthiza pusilla albiventris North. 
Acanthiza pyrrhopygia Gould, Birds of Aust., iii, 1847, pi. 58; Murray 
River, South Australia. (Not Acanthiza pyrrhopygia Vig. and 
Horsf., Trans. Linn. Soc., xv, 1827, p. 227). 
Acanthiza albiventris North, Aust. Mus. Spec. Cat., i, 1904, p. 276; 
Dubbo, New South Wales. 
Acanthiza albiventris hamiltoni Mathews, Bull. Brit. Ornith. Club, xxvii, 
1911, p. 97 ; New South Wales, error = Coonalpyn, South Australia. 
Acanthiza pusilla cobborensis Mathews, Birds of Aust., ix, 1922, p. 412; 
Cobbora, New South Wales. 
Acanthiza pusilla lingerandi Mathews, ib. p. 430; Lingerandi, Victoria. 
Range. — South-central Queensland, inland New South Wales, north- 
western Victoria and adjoining area of South Australia, west to Yorke 
Peninsula, and possibly to extreme south of Eyre Peninsula, South Australia. 
Specimens Examined. — Twenty-nine from the following localities : Queens- 
land: Chinchilla. New South Wales: Gunnedah, Manilla, Cobbora, Narrabri. 
Victoria: Kow Plains. South Australia: Fifty miles south of Pinaroo, 
Coombe, Wellington, Wingamin, Murray River. 
Measurements. — Twenty-nine specimens of both sexes : wing, 49-55 
(517); tail, 40-47 (44); exposed culmen, 8-9 5 (8 9); tarsus, 17-19 5 
(18 3). 
Subspecific Characters. — Differs from all coastal and insular races in being 
paler, drab to hair brown above, whiter on the under surface, and feathers of 
forehead are mainly blackish brown with distinct white or buffy white sub- 
terminal band. Distinguished from all forms of the species by the conspicuous 
russet to tawny colour of upper tail-coverts and outer margins of basal portion 
of tail feathers. Equalled only by whitlocki, the other, more pallid inland race, 
in depth of tail-band (12-14 mm.), which is more distinct on central tail 
feathers, and in having a large white spot at tip of inner web of lateral tail 
feathers. 
