HORN EXPEDITION-AVES. 
57 
One adult male, Hermannburg; one immature male, Heavitree Gap. The 
latter has the head and two central tail feathers strongly washed with rufous. 
[This species is dispersed throughout the continent, and its habits appear to 
be similar in all places. Its food consists chiefly of insects, lizards and mice ; but 
small birds are also greedily devoured. Some of those seen near Alice Spx’ings 
were lighter in colour than those found further south.] 
No. 7. Ninox boobook, Latham. Boobook Owl. 
Strix boobook, Lath., Ind. Orn., Suppl., p. xv. (1801). 
Athene boobook, Gould, Bds. Austr., fob, Vol. I., pi. 32 (1848); Sturt, Exped. 
Cent!'. Austr., Vol. II., App. p. 17 (1849). 
Ninox boobook, Sharpe, Ibis, 1875, p. 258 ; id., Brit. Mus. Cat. Bds., Vol. 
II., p. 168 (1875); North, Nests and Eggs Austr. Bds., p. 25 (1889). 
One adult male, Finke River ; one adult female, Alice Well. The latter speci¬ 
men has a greater extent of white on the face than is usually seen in this species, 
but is similar to examples obtained in the western district of New South Wales. 
[These birds were found wherever the timber was large enough to furnish a 
hollow spout in which they could retire during the day, whilst at night their 
mournful note was often heard in several directions at the same time. They are 
very destructive amongst the small bii’ds, which form their chief food.] 
No. 8. Cacatua leadbeateri. Vigors. Leadbeater’s Cockatoo. 
Plyctolophns leadbeateri, Vig., Proc. Zool. Soc., 1831, p. 61. 
Cacatua leadbeateri, Gould, Bds. Austr., fob. Yob Y., pb 2 (1848); Sturt, 
Exped. Centr. Austr., Vol. II., App. p. 35 (1849); Sclat., Proc. Zool. Soc., 
1864, p. 188; Clark, Trans. Roy. Soc. South Austr. (Field Nat. Sect.), p. 
29 (1889); North, Nests and Eggs Austr. Bds., p. 251 (1889); Ramsay, Cat. 
Austr. Bds., Psittaci, p. 3 (1891); Salvad., Brit. Mus. Cat., Yob XX., p. 123 
(1891). 
Plictolophus leadbeateri, Finsch, Die Papag., Yob I., p. 304 (1867). 
Two adult specimens, male and female, Alice Well. 
[These birds were first seen near Finke Gorge, but were too shy to approach 
within shot. At Alice Well a pair were secured, and I was there informed that 
