AVES- 



RHEID^. 



I I 



defined white stripes, one on either side of a median region of seal 

 brown. These three stripes, one dark and two white, are about half an 

 inch in width and starting from just between the shoulders, end at the 

 region of the tail. 



Beneath the general color is pale buffy white with a median stripe of 

 dusky gray. The downy covering of the legs is buffy white, with a dark 



Fig. 6. 



Fig. 7. 



Fig. 8. 



R/ua danvini. Lower leg 

 of downy chick. Profile. Nat- 

 ural size. 



Rhea darivini. Lower leg 

 of downy chick. Front view. 

 Natural size. 



Rliea darwini. Lower leg 

 of downy chick. Back view. 

 Natural size. 



seal brown area on the back and lighter and less clearly defined area near 

 the front, on the exterior feathered part of each leg. 



The tarsus is featlicyed and scutellated precisely as in the adult bird. 

 (See Figs. 6, 7 and 8.) 



Geographical Range. — Patagonia. Especially the southern half, be- 

 coming less common in the more northern portions and extending to 

 Tarapaca. 



A remarkable feature of the feet of the downy young is an extensive 

 soft pad under each toe reaching from the nail to the juncture of the toes, 

 and extending so far on each side of the toes as to give a webbed or 

 semi-palmate appearance to the foot. (See Fig. 9. ) 



It is well known that both this species and the preceding one are vigor- 

 ous swimmers, crossing wide and swift-flowing rivers and even passing 



