58 
HORN EXPEDITION—AVES. 
when a particular grass-seed is ripe tliey are seen in flocks of several hundreds 
feeding on the ground, and the natives kill them with their boomerangs. Several 
holes in the spouts of red-gum trees were pointed out as their breeding-places.] 
No. 9. Calyptoriiynciius stellatus, Wagler, Western Black Cockatoo. 
Calyptorhynchus stellatus, Wagl. Mon. Psitt., p. 685, t. xxvii. (1832); 
Bamsay, Cat. Austr. Bds., Psittaci, p. 20. (1891); Salvad., Brit. Mus. Cat. Bds., 
Vol. XX., p. Ill (1891). 
CaJyptorhyiichus naso, Could, Bds. Austr., fol., Vol. Y., pi. 9 (1848); North, 
Nests and Eggs Austr. Bds., p. 252 (1889). 
Calyptorrhynchns stellatus, 
Finsch, 
Die Papag. 
, Vol. 
L, p. 35 
1 (1867). 
Total 
length. 
Wing:. 
Tail. 
Tarsus. 
Bill in 
height. 
c. 
P 
ad. sk. 
- 20in. 
15 
10-5 - 
0-8 
- 2-5 
Goyder’s Well. 
D. 
P 
ad. sk. 
- 20in. 
14-7 - 
10-5 - 
0-9 
- 2-5 
Petermann Ck. 
E. 
$ 
ad. sk. 
- 20-2111. - 
15-2 - 
10-5 - 
0-9 
- 2-7 
Darwent Ck. 
F. 
2 
ad. sk. 
- 21in. - 
14-5 - 
10-5 - 
0-85 
- 2-G 
Darwent Ck. 
G. 
? 
acl. sk. 
- 20-5in. - 
15-3 - 
10-7 - 
0-87 
- 2-5 
Darwent Ck. 
The males are similar in size and plumage to examples obtained at King 
George’s Sound ; in one specimen, the crimson band across the median portion of 
the tail-feathers extends in a narrow line along the shaft of the outer web of the 
outermost feather on either side. The cross-ljars on the under surface and under 
tail-coverts of the females are less numerous and much duller in colour than in 
specimens procured in West Australia. 
C. macrorhyiichus, from northern Australia, is larger in all its admeasurements, 
and has a much longer crest. An adult female in the Macleay Museum, obtained 
at Port Darwin, measures as follows:—Total length, 22-4 inches; wing, 15-8 
inches ; tail, 12 inches. 
[Our first specimen was shot by Mr. Horn at the Goyder Well on 15th May, 
and I was informed that that is the most southern point at which they are found. 
The breeding season for these birds was evidently just over, as at Trickett’s Creek 
we found them so numerous that four were killed at one shot. On several occasions 
large flocks were seen, and, judging from the large proportion of young ones shot 
and the poor plumage of many adults, flocking had only recently taken place. 
Unlike most other members of this genus they are frequently seen on the ground. 
When practicable, they perch on the tops of the trees and devour the seed from the 
