102 RUDOLF SÖDERBERG, STUDIES OF THE BIRDS IN NORTH WEST AUSTRALIA. 
Pardalotus melanocephalus uropygialis GouLpD. 
Math. handl. n:r 730. SI juv., S ad. Nooncanbah, Fitzroy r. !!/:2 1910, moult.; 9/1 1911, moult.; 9 ad. 
Meda, Kimb. 5/5 1911. 
Juvenal. — Crown of the head like the back, forehead tinged with yellow. 
Eyebrow sulphur-yellow (not orange), whitish behind the eye. Upper tail coverts 
bright yellowish. Under part whitish with a faint tint of yellow on throat and breast. 
Flanks somewhat pale brownish. 
Moulting. — The juvenal and the specimen from ”/1 in moulting. The crown 
of the head (of the latter) moulting, with some ashy feathers among the black ones. 
(A rather young bird.) Other parts of the plumage the same as in the adults. 
Ecological. — Appeared scattered at Meda, Derby and Nooncanbah (Fitzroy). 
The singing of this bird is peculiar, because it goes in semitones down the musical 
scale in 7—38 steps. 
Fam. Meliphagidee. 
Melithreptus lunulatus subalbogularis MATH. 
Math. handl. n:r 734. 3 SS ad. Derby, Kimb. ?/5 1911; SJ ad. Beagle bay, Dampier 1. !3/; 1911, 
back moult.; 9 ad., ibid. strong moult. in back and breast; J juv., ibid. !5/;, moult. in back and breast, also in 
the bigger wing-coverts, crown of the head, ete.; SJ ad., ibid. ?/7, moult. in back, breast and wing-feathers. 
The juvenal, — which is in moulting, has the crown of the head parti-coloured 
by new black feathers and light-brown ones, that belong to the plumage of the young 
male. Small wing-coverts also parti-coloured of light-brown and blackish brown, the 
latter new feathers of the adult. 
Mouliing. — These specimens, which moult in (the middle of) July, show 
that a moulting season occurs during the winter. (Cf. the moulting in July of Ma- 
lurus). 7 
It ought to be mentioned that the temperature in Beagle Bay in July was 
sometimes — 3” C. at night; such a low point was not observed in Kimberley. 
Was rather frequently seen round Derby, and above all in Beagle bay, where 
I pretty frequently heard the melodious whistling of the bird. 
Melithreptus gularis coongani MATE. 
Math. handl. n:r 737. 2 JJS ad. Derby, Kimb. 7/10, ?!/10 1910, worn plumage; JF ad., 2 ad. 
Nooncanbah, Fitzroy r. ?!/12 1910, moult. of back, wing-feathers, etc.; 3/1 1911, nearly fully-moulted; tail-feathers 
growing out. 
Moulting — in Dec. and Jan. (Cf. M. lunulatus subalbogularis.) 
In Oct. this species was met with at Derby where it was rare at that time. 
During the breeding-season it was found up at the river (Noocanbah, Fitzroy) 
though not frequently. 
