AVES — IBIDID^. 



357 



P. Z. S. 1882, p. 625 (Punta Lara, Buenos Aires); Carabajal, La 



Patagonia, part ii, p. 272 (1900). 

 Falcinellus thalassinus, Elliot, P. Z. S. 1877, p. 507 (Chili : Straits of 



Magellan). 

 Plegadis falcinellus, Barrows (nee Linn.), Auk, I. p. 272 (1884: Concep- 



cion, resident). 



General description. 



Size. — k.<\M\\. male. (P. U. O. C. 8640, La Plata, February, 1894. S. 

 Pozzi.) Total length, about 21 inches. 



Wing, 10.7. 



Culmen, 5.2. 



Tail, 3.7. 



Tarsus, 4.2. 



The adult female is smaller and with a relatively shorter bill. There is 

 a very considerable individual variation in size. 



Fig. 180. 



Profile of head, Plegadis guarauna. 8640 Princeton University Collection. About ^^ nat- 

 ural size. 



Color. — Adult male (cited). General color above bronzy green and 

 below rich deep chestnut. 



Head : Forehead and crown glossy green. A narrow frontal band- 

 across the forehead, reaching back and bordering the naked area around the 

 eye, dull white. Sides of head and face deep chestnut, with a maroon tinge. 

 The base of the cheeks shaded with bronzy green. Naked skin about the 

 lores, eyes and chin, crimson lake in life, drying to yellowish brown. 



Neck deep chestnut, maroon in tone, with a naked crimson lake area 

 at base of chin, bordered narrowly with dull white feathers. 



