AVES PODICIPEDIDyE. 69 



Oilmen (from feathers on forehead), i to 1.2 inches. 

 Wing, 5.3 to 5.5 inches. 

 Tarsus, 1.8 inches. 



Color (adults in breeding plumage). General coloration like that of 

 P. americanus except the lower parts (breast and belly) which are much 



FIG. 35. 



Podicipes rollandi. Profile of head. Natural size. Adult male. From specimen in the British 



Museum. 



brighter, being rufescent chestnut. The green gloss of the upper parts is 

 also much more pronounced. 



Geographical Range. The Falkland Islands. 



The much larger size and the chief difference in color noted above will 

 serve at once to discriminate P, rollandi from its close ally P. americamis. 

 The measurements and description given are based on material in the 

 British Museum of Natural History, for the Princeton Expeditions did 

 not explore the Falkland Islands. In view of the lack of material it is not 

 possible to notice the non-breeding plumage of this grebe, but it seems 



