108 SYSTEMATIC REVISION OF THE AUSTRALIAN THORNBILLS 
Range. — Inland mid-western to Central Australia. 
Specimens Examined. — Nineteen from the following localities: Western 
Australia: Day Dawn, Yalgoo, Lake Way, Borewell. Central Australia: 
Musgrave Ranges, Everard Ranges, Moorilyanna, Snider’s Hill, Cockatoo 
Creek, Hermannsburgh. 
Measurements. — Seventeen adult specimens of both sexes : wing, 50-54 
(52); tail, 39-45 (41 - 9); exposed culmen, 8-8 5 (8 2) ; tarsus, 17 5-19 
(18). 
Male. — Forehead blackish, each feather with a curved subterminal band of 
white; from forehead to nape neutral grey, shafts of feathers prominently 
brownish black; lores, above and below eyes whitish, each feather margined 
dark brown ; upper and lower back mouse grey ; feathers of rump broadly 
tipped white, tinged buff ; upper tail-coverts wood brown ; basal portion of 
tail avellaneous, becoming blackish brown and pale drab at tip, with a white 
spot at tip of inner margins of all except central feathers; wings fuscous, 
outer margins of basal half of primaries and greater wing-coverts, and both 
margins of secondaries dull white ; upper and median wing-coverts broadly 
margined mouse grey ; general colour of ventral surface including under tail- 
coverts, white, dull on chin and throat, tinged grey and buff on breast, and 
vinaceous buff on flanks ; axillaries, under wing coverts and inner margins of 
wing-quills white, tinged buff. “'Eyes reddish brown ; bill and feet black.” 
Female. — Similar to male. 
7, Acanthiza robustirostris. 
Although resembling uropygialis in the rufescent colour of 
base of tail and upper tail-coverts, this is a well-marked and 
distinct species, and both species are found in the same area. 
The grey colour of the dorsal surface, and blackish shaft lines 
of the crown are characters peculiar to robustirostris. I have 
