SYSTEMATIC REVISION OF THE AUSTRALIAN THORNBILLS 111 
The dull olive colour of the back and greenish under sur- 
face, compared with the rich green and yellow of these parts 
in typical nana and flava, makes this an easily recognized race. 
Specimens from the extreme north-western part of the range 
are intermediate between modesta and mathewsi. 
Fig. 8. Distribution. 
8, Acanthiza nana nana; 8a, A. n. flava ; 8b, A. n. mathewsi; 8c, A. n. modesta. 
Acanthiza nana modesta De Vis. 
Acanthiza modesta De Vis, Ann. Queensld. Mus., No. 6, 1905, p. 43; 
Charleville, Queensland. 
Acanthiza pygmea Milligan, Emu, xii, 1913, p. 167 ; Mallee, Victoria. 
Acanthiza nana dawsoniana H. L. White, Emu, xviii, 1918, p. 122; 
Dawson River, Queensland. 
Range . — From inland mid-eastern Queensland, south-west through inland 
New South Wales to north-western Victoria and adjoining part of South 
Australia. 
Specimens Examined. — Twenty-three from the following localities : Queens- 
land; Dawson River (type of dawsoniana) , Charleville (type of modesta). 
New South Wales : Manilla district, Cobbora. Victoria ; Kow Plains (type 
of pygmea), Raak. South Australia: Murray River, Flinders Range. 
Measurements. — Twenty-two adult specimens of both sexes: wing, 48-54 
(49 8) ; tail, 37-42 (38 8) ; exposed culmen, 8-9 (8 2) ; tarsus, 16-17 (16). 
Subspecific Characters . — Differs markedly from all other forms, particu- 
larly typical nana and flava, in its much paler colouration throughout. Dorsal 
surface dull citrine, chin and throat naples yellow, merging on breast to 
naphthalene yellow of remainder of ventral surface, tinged barium yellow on 
flanks. 
