Vol. XVIII 

 igoi 



I Stejneger, The Tivo Bares of Saxicola ocnanthe. 1 87 



and Africa migrating in summer to Greenland and adjacent 

 countries to breed. In the paper quoted I stated " that out of a 

 total of 122 typical Saxicola x nant he onXy 5 have the wing 100 or 

 10 1 mm., while of 45 Saxicola leiicorhoa none measure less than 

 100 mm. In other words, only 4 per cent of the small race 

 exceed 99 mm., while none of the larger are below 100. In the 

 whole series of 165 birds, consequently, only 3 per cent of the 

 specimens are intermediate." This statement can now be modi- 

 fied to the effect that of a total of 138 typical S. cenanthe only 3.6 

 per cent of the small race exceed 99 mm., while of 46 specimens 

 of the larger race none are below 100 mm., and that consequently 

 out of the whole series of 182 birds only 2.75 per cent are inter- 

 mediate. 



It is also interesting to note that the average of the extremes of 

 Dr. Sharpe's measurements of the small race, viz., 94.5 mm., is 

 identical with the average of the 65 specimens measured by me 

 as shown in the diagram {op. cit., p. 481) and that the West Afri- 

 can specimen of the larger race is identical with the average of 28 

 specimens as shown in the same diagram. There is consequently 

 every reason to conclude that the results deducible from the dia- 

 gram in question are founded in Nature. 



It is then pretty safe to say, that the short-winged Saxicola 

 cefianthe in Alaska goes to India in winter, and that the long- 

 winged S. ivnanthe leucorhoa from Greenland winters in West 

 Africa. 



