10 



PATAGONIAN EXPEDITIONS I ZOOLOGY. 



FIG. 4. 



The throat is pale buffish gray, the hairy long feathers being of the 

 same shade. 



Neck : Exclusive of the throat the neck has a similar 

 but noticeably darker ground color, the hairy long feath- 

 ers are lacking but a general finely striped effect is 

 produced by the dark brown median portion of each 

 feather. 



Wings : Short and imperfect. Secondaries, dark 

 buffish brown like the back and tipped extensively with 

 silvery white. 



Tail not apparent. 



Rump brown, each feather with distinct silvery white 

 tip. 



Lower parts dull grayish white. 

 Legs : Feathered portion dull buffish brown. The 

 feathers extend down on the metatarsus as shown in Fig. 

 4, then comes an area of small reticulate scutes and 

 finally the lower part of the tarsus has transverse scutes. 

 Bare portion of tarsus yellowish horn brown. Feet 

 paler. 



Bill horn brown. 

 Iris dark hazel. 



The female is similar to the male in size and 

 color. 



Downy Young. Princeton University col- 

 lection, No. 7,853. Taken near Coy Inlet, 

 Patagonia, 12 November, 1896. 



General character of down much like that 

 of newly hatched ducklings. 



Color. The head is grayish, the longest 

 feathers darker, giving a general dusky effect. 

 The neck is pale gray, almost white beneath. 

 A dark stripe proceeds from the occiput down 

 the back of the neck, becoming gradually 

 darker, until where the neck joins the body 



. . 1 Rhea darwini. Downy chick. 



it is deep seal brown. This color also distm- ^ naturai size . From specimens 

 guishes the back, but is broken by two clearly collected by Mr. Hatcher. 



Lower leg of Rhea 

 darwini, showing 

 feathering and scute 

 pattern. 



FIG. 5. 



