N.W. Argentina and the Bolivian Chaco. 461 



Brit. Mus., but the description in that work agrees with the 

 present specimen. 



-|-16. Plegadis guarauna (Linn.). 



An adult bird shot at Carapari, March 11th, 1902. Iris 

 hazel. 



A young bird from Tatarenda, March 20th, 1902. 



This species occurred in flocks on the wet meadows. 

 Mr. von Hofsten says that he thinks that there must be two 

 kinds of this Ibis, as he remembers that he always saw larger 

 birds in one flock and smaller birds in another. The differ- 

 ences in the skins that I have examined are, however, not 

 greater than those recorded for young and adult or male 

 and female birds in the ' Catalogue of Birds/ 



17. Theristicus melanopis (Gm.). 



A specimen shot at Tatarenda, March 23rd, 1902 (iris 

 reddish yellow, feet red), has the coloration of the plumage 

 as described in the Cat. Birds Brit. Mus., but the subterminal 

 black band of the dorsal feathers is only faintly visible. Two 

 or three of the inner secondaries are white on the outer web. 



-f-I8. Platalea ajaja (Linn.). 



Iris yellowish white, according the label (according to 

 Salvadori " iride bruna," and according to the Cat. of Birds 

 bright carmine) . Length of wing 390, of tail 108, of culmen 

 180 mm. ; these measurements are all larger than those 

 indicated in the Cat. of Birds. The tarsus measures 108 mm., 

 which is the same as in the work just quoted. 



The Roseate Spoonbill is common at the borders of all 

 the waters. A specimen was shot at Tatarenda, April 3rd, 

 1902. This species lives in pairs and is very shy. 



19. Molybdophanes CjErulescens (Vieill.). 



Occurs in large flocks along the river, but is very shy. 

 Iris light yellow, legs black. April 1902, Fortin Crcvaux. 



20. Akdea cocoi Linn. 



Iris yellow ; legs yellow, according to the label (said to 

 be " grigio-bruna " by Salvadori, Boll. Tor. x. p. 21). Only 

 one specimen seen and shot, April 1902, at Tatarenda. 



