some Suuth-Ainerican Binh- 



ito 



he found iu the inner secondaries and tertials, as shown in 

 the text-figure. 



In the adult the concentric rings are broken and usually 

 quite open towards and at the tip. In the young these 

 feathers have complete concentric rings, i. e. closed towards 

 and at the tip. 



Text-fijr. 4. 



CJ^-^'^ 



A 



B 



Feathers from (A) the young-, and (B) the adult of 

 NofJiura maculosa. 



There is also a difference in size, the younger birds being 

 somewhat smaller and more buffy than the fully adult ; 

 but these differences are not perhaps always to be relied 

 on, though those of the feathers appear to be quite constant. 



Rallus rhytirynchus. (Ibis, 1911, p. 462.) 



The young plumage o£ this species appears to be un- 



described ; it differs from the adult as follows : — 



Above olive-brown, paler on the wings and more sooty on 



the head and rump ; wing-feathers and tail sooty brown, the 



