108 RUDOLF SÖDERBERG, STUDIES OF THE BIRDS IN NORTH WEST AUSTRALIA. 
only one tail-feather is dropped as yet, though body and wings are almost complete. 
(The corresponding feather is dropped in each wing successively.) | 
Ecological. — In addition to Nooncanbah (Fitzroy river) the minah was also 
found in Mowla Downs, where I saw a flock of 8 wandering about after the first 
rains, evidently looking for breeding-places. 
Philemon orientalis occidentalis MATH. 
Math. handl. n:r 819. 3 SS ad. Derby, Kimb. !8/;o 1910, worn plumage (small testes); SJ ad., 2 28 
ad. Nooncaubah, Fitzroy r. ”"/12 1910, moult. complete; only tail and some wing-feathers left; ”/1 1911, moult. 
complete, only some wing-feathers and tail left; 4 SS ad. Beagle bay, Dampier 1. ”/7, !/7, "14 1911: Q ad. 
SON 
Moulting-season. — Dec.—Jan. No moulting in July, but whether it is earlier 
is impossible to decide. Tail the last part to moult, wings later than or to some 
extent at the same time as the body. 
Was rather general in the places named above. 
Philemon argenticeps argenticeps GouLp. 
Math. handl. n:r 816. 
The species was commonly found at Sunday Island, where it dwelt in the trees 
on the mountain slopes. 
Fam. Motacillidee. 
Anthus australis tribulationis MATH. 
Math. handl. n:r 822. JF ad. Derby, Kimb. 3/4 1911: I ad. Broome, Dampier 1. 4/38 1911, worn plumage. 
Juvenal. — More spotted plumage than the adults. 
Variants. — Specimen no. 2 does not look as if it had a winter moult. 
This specimen has a considerably paler dress than specimen no. 1, and I should 
scarcely hesitate to name it subrufus (subspecies from Onslow), if everything did not 
indicate that the pale colour was a secondary phenomenon, a discoloration, caused 
by external conditions. The specimen is, as a matter of fact, approaching the 
moulting season. 
Moulting. — A young bird, shot the 6th of April, also showed symptoms ot 
moulting. The second outermost white tail-plume is growing out and also the third 
one. Back, upperrump and upper part of the head have pins, and also the belly to 
some extent. 
Kcological. — The pipit appeared in the beginning of April round Derby 
and then in flocks, particularly at King's Sound. TI have also seen it in Dampier 
land (Broome), though in the month of Aug. Its movements on the ground were 
