84 RUDOLF SÖDERBERG, STUDIES OF THE BIRDS IN NORTH WEST AUSTRALIA. 
Petreca cucullata picata GouLp. 
Math. handl. n:r 449. JF juv. Mowla Downs ?7/11 1910, moult. 
Juvenal — in typical juvenal plumage in the parts that are left of the first 
dress. In those parts there are white spots like drops in the centre of the feathers 
of the back and on the head. 
It seems doubtful, whether the male always acquired the developed plumage 
already in the first moulting. New feathers (pins) on the breast are greyish white, not 
black. Nothing black has been developed on the back. 
This robin was sometimes seen by me at Mowla Downs. On ”7u and '"/i2 I 
saw a nest built on a thick branch of an Acacia, containing two greenish coloured 
eggs with brown spots. The bird was rare. 
Smicrornis brevirostris GouLp. 
Math. handl. n:r 449. 2 SS ad., 2 ad. Nooncanbah, Fitzroy r. 27/12; ?/1 1910; ?9/; 1911, all moult. 
Whether these forms represent the subsp. mungi or rogersi, living in the same 
district (N. W. Australia), it is impossible to decide. 
Moulting. — The birds, shot during Dec. and Jan., are in moulting. One specimen 
has new tail-feathers grown out. 
This form was met with at Mowla Downs and at Meda, where it dwelt in the 
leafage of the trees at a creek. Not common, though not rare. 
Gerygone albogularis rogersi MATE. 
Math. handl. n:r 451. 9 ad., S juv. Meda, Kimb. 4/5, ”/5 1911; I (ad.) Beagle bay, Dampier 1. ?/7 1911. 
Juvenals. — No. 3 is a youngish bird, with yellow feathers on the white 
throat. Bill not so dark as in the adults. No. 2 is probably a young male with 
yellow throat and cheek. But the front of the head also has a bright yellow tint, 
and the back and lower abdomen are tinged with the same colour. Bill brown. 
Was observed at Meda in the same place as Snvicrornis, and in Beagle bay 
(Dampier land). Not common. 
Gerygone leavigaster mungi MATH. 
Math. handl. n:r 462. 9 ad. Beagle bay, Dampier 1. ?/7 1911; I (ad.) Beagle bay, Dampier 1. 3/7 1911. 
Not common in Beagle bay (Dampier land). 
Fam. Laniidee. 
Rhipidura flabellifera preissi CAB. 
Math. handl. n:r 480. 2 SS ad., 2 ad. Beagle bay, Dampier 1. !/;, 11/7 1911. 
