KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 52. N:0O 17. 
An 
ban 
1. The dark type. 
The lower side dark all over. (Plate 3, fig. 1.) 
2 ad., FS ad. Nooncanbah, Fitzroy r. !9/; 1910, ??/1 1911; 9? ad: Hot Spring ?/2 1911, moult.; I ad. 
O 
Meda, Soil ereek ?7/5 1911; 2 SS ad. Broome, Dampier 1. 19/5 1911; 2 SS ad., 8 ad. Beagle bay, ibid. 39/g, 
18/7, 12/7 1911; 8 ad. Mowla Downs !7/;2 1910. 
2. Dark transitional forms. 
a) The lower side speckled, not dark all over. The back more brown than in the 
former. (Plate 3, fig. 2.) 
2 ad. Beagle bay, Dampier 1. ””/& 1911; 92 ad. Broome, ibid. 17/1 1911, moult.; 9 juv. Nooncanbah, 
Fitzroy r. ?9/; 1911, brown edges; SJ juv. Hot Spring, Fitzroy r. 14/2 1911, moult.; SJ (ad.) Derby, Kimb. ?5/4 
1911; 3 SI (ad.) Beagle bay, Dampier 1. 2/1, 20/7, 30/6 1911; 9 ad. ibid. 22/6 1911. 
b) Like specimens a) but more speckled on the under surface and also Uighter on 
the back. 
3 did vadgj Pad. Beagle bay, Dampier 1. 1847, te, Se, 6 1911. 
3. Lighter transitional forms. 
a) The under surface very much Vighter. (Plate 3, fig. 3.) 
Q ad. Beagle bay, Dampier 1. 3/6 1911 (dark brown thighs); 92 ad. Broome, ibid. !7/6 1911; 3 ad. 
Beagle bay, ibid. 2/7 1911; 2 ad. Derby, Kimb. !$/:9 1910. 
b) To this group belong two (young) specimens with a curiouwsly dull colour on 
the under side where the speckled ornamentation prevails. (Plate 3, fig. 4.) 
Q”juv.(?) Beagle bay "2/6 1911; 9 juv.(2) ibid. !/7 1971. 
4. The light type. 
In general lighter, especially on the back, than the former, and somewhat speckled 
on the under side. (Plate 3, fig. 5.) 
Q juv. Meda; Kimb. ?/6 1911; 9 juv., S (juv.) Beagle bay, Dampier 1. 2/6 1911; 3/6 1911; 9 juv., 
J—, 2 juv. Broome, ibid. !2/6, 18/6, !9/6 1911; P9 ad.? Beagle bay, Dampier 1. ??/& 1911. 
Plumage. — The collection of 36 specimens of this species, made at different 
seasons of the year (most of them in the winter) show, as is seen by the scheme 
above, one dark and one light type with transitional forms between them. 
I have not thought it necessary to give any detailed description of these dif- 
ferent groups. Among the light type there are many younger birds, while the dark 
type consists of older ones. 
It ought, however, to be mentioned that fully-developed testes were found in 
the light type (the specimens of the 18th of June, consequently at winter time). In 
the adult dark birds' there appear chestnut-brown edges on the small wing-coverts 
E. Sv. Vet. Akad. Handl. Band 52. N:o 17. 8 
