152 BULLETIN 133^ UNITED STATES NATIONAL MUSEUM 



in the posterior border of the metasterniim, while in the nine remain- 

 ing there are four such indentations. In hypoleucos and macularia 

 the maxilla is grooved nearly to the tip, while in ocrophus and soli- 

 taria this groove extends less than two-thirds of the length of the 

 maxilla. Actitis may be used for the first two leaving ocroylius, 

 the type of Tringa^ and solitaria united in the genus Tringa. Of 

 the two species that remain of the 13 mentioned by Hartert Hetero- 

 scelus may be used for incanus (and also for hrevipes) because of 

 its difference in tarsal scutellation, while glareola, closely allied to 

 the species here placed in Totanus, differs in that the tarsus is de- 

 cidedly less than one and one-half times the middle toe without the 

 claw and so may be maintained in Rhyacophilus. 



During my work in South America the greater yellowlegs was 

 recorded as follows: Kilometer 80, west of Puerto Pinasco, Para- 

 guay, September 8 to 21, 1920; Kilometer 200, in the same region, 

 September 24; Dolores, Buenos Aires, October 22; Lavalle, Buenos 

 Aires, October 23 to November 15 ; Carhue, Buenos Aires, December 

 15 to 17; San Vicente, Uruguay, January 31 and February 2; Laz- 

 cano, Kocha, February 5 to 8; 25 de Mayo, Buenos Aires, March 2; 

 Guamini, Buenos Aires, March 3 to 8; Tunuyan, Mendoza, March 

 25 to 28; Tucuman, Tucuman, April 5; Concon, Chile, April 24 

 and 26. 



After their arrival in September greater yellowlegs were dis- 

 tributed throughout the open pampa wherever shallow ponds offered 

 suitable feeding places. Occasionally 10 or 20 gathered in a flock, 

 especially when northward migration was under way in March 

 and April, but when on their wintering grounds it was usual to find 

 two or three in company, seldom more. They are rather silent 

 during the winter season but when the northward journey begins 

 are as noisy as is their custom in the north. The species is large 

 so that it is attractive to pot hunters and many are killed. I saw 

 a number of crippled birds during the last two months of my stay 

 in Argentina and consider that it is these injured individuals, unable 

 to perform the necessary flight, or without desire to do so from 

 their injuries, that are recorded on the pampas from May to August 

 when all should be in the Northern Hemisphere. Reports of their 

 breeding in Argentina, based on the presence of these laggards in 

 migration are wholly unauthenticated. 



An adult female shot February 2 at San Vicente, Uruguay, and 

 another taken March 6 at Guamini, Buenos Aires, were molting 

 the feathers of the forepart of the body and the neck. The primaries 

 were fresh and unworn and appear to have been newly grown. 



