474 Mr. C. H. B, Grant on Birds collected in Argentina, 



The flight and call reminded me very much of the European 

 Little Tern [S. minuto). 



The nest was a mere hollow scraped in the sand, generally 

 under the cover of a tuft or of a few blades of grass, and 

 three eggs seems to be the full clutch. 



Twenty-five eggs were brought honie, taken at Colonia 

 Ilisso, Paraguay, Sept. 9, and Rio Apa, Sept. 10; many of 

 these agree with the description given in the ' Catalogue of 

 Eggs in the British Museum/ others have the ground stone- 

 colour, some being slightly deeper in tone than others. 



268. Gelochelidon anglica. 



Gelochelidon anglica Saunders, Cat. B. xxv. p. 25. 



a, 6. (^ ? ad. Luiconia, Ajo. April 29, 1909. 



Both specimens are in full winter plumage. In the Ajo 

 district I have only noticed this Tern near the tidal waters, 

 and on the date on which I obtained the two birds I saw 

 many hawking over the creek or sitting on the grassy flats 

 in company with numberless Gulls. I, however, believe that 

 it is only a winter visitor to this district. Both on the wing 

 and sitting it can be distinguished from every other Tern by 

 the black b.ll, which is very striking. The 29tli of April 

 was the first day that I saw ir, and afterwards I noted it 

 only near Bella Vis^ta, on the Rio Parana, when four were 

 observed flying about the river on November 12, 1909 (these 

 had black crowns) ; while on my second visit to the Ajo 

 district I saw a few in March 1910 in winter dress. 



269. Larus dominicanus. 



Lams dominicanus Arg. Orn. ii.p. 197 ; Saunders^ Cat. B. 

 xxv. p. 215. 



a. c? ad. Cape San Antonio. Dec. 21, 1908. 



b. S ii"ra- „ „ „ Dec. 21, 1908. 



c. J young. Los Ynghises, Ajo. Mar. 8, 1909. 



d. S ad. „ „ May 24, 1909. 



e. $ young. Tuyu, Ajo. Feb. 28, 1910. 

 /. ? imm. „ „ Mar. 1, 1910. 



This is quite a common Gull in the Ajo district and is 



