KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 52. N:o |7. 93 
most part heard while the bird flew from one treetop to another, but it also sang 
when sitting. It, too, lives on the ground. 
Cincloramphus cruralis rogersi MATH. 
Math. handl. n:r 538. 2 SJS ad. Hot Spring, St. Georges Range !9/> 1911, fullmoulted. 
Was met with, though rarely, at Hot Spring (St. Georges Range) (WIiDELL). 
Fam. Turdide. 
Ephthianura tricolor assimilis MATH. 
Math. handl. n:r 547. J Hot Spring, St. Georges Range, "/3s 1911, moult.; 5 SS Derby, Kimb. ?7/3, 
28/8 112/4, "Ja, 2/5 TY911; all moult: 
Moulting. — These specimens, adult and juvenal birds, were all in strong moulting. 
A comprehending of the observations shows an instance more of the kind of moulting, 
which is described concerning the species Lalage tricolor indistincta. 
The red colour, just about to be developed, is obtained by partial colouring of 
the feathers. There are thus birds both with the change of plumage at very different 
stages and with very different development of the partial colouring of the feathers. 
Total colouring (red feathers in sheaths) is also seen. The juvenal, however, does 
not get all the feathers totally coloured in the first moulting. Some of them grow 
out and seem to remain with only a sprinkling of red, while others become entirely 
red, and other again lack every trace of it. 
Consequently we have the following cases: 
1”. The red colour is present as edgings at the point of the pale yellow-brown 
feather. 
22. The red colour is found as spots, sprinkled in the pale yellow brown part 
of the feather. 
3”. The feather is totally coloured (red). 
Birds, belonging to the Cases 1 and 2, with their feathers with varied colours, 
are distinguished also by the presence of new feathers, not red-coloured, but pale 
yellow-brown (in the same part of the plumage). But in case 3 there are no in- 
stances of mixed feathers at all. 
But a specimen was met with, which had quite red crown-feathers as pins, 
mixed in with new and quite pale yellow-brown ones side by side. 
The appearance of the feather (from the head) is as follows: The base dark 
brown, after that a white, uncoloured part (though not in all cases), and then the 
pale yellow-brown part that forms the surface colour. Where red edgings are present, 
these colours are found behind the red. But where this colour is augmented and 
comprises about half the feather, the pale yellow-brown has disappeared. After the 
