296 PATAGONIAN EXPEDITIONS : ZOOLOGY 



forehead and face mark is not so well defined. The rufous generally paler 

 in shade and washed with ashy grey on the occiput and nape. 



An immature bird (P. U. O. C. No. 7787, female, Chebunco, 12 miles 

 from Punta Arenas, Straits of Magellan, Patagonia, 10 January, 1898, A. 

 E. Colburn) differs from adults chiefly in its much lighter ashy color above, 

 in the obscuration of the black forehead band and ear-stripe and in the 

 absence of all cinnamon rufous, except an irregular area of that color, light 

 in shade, on either side of the neck just back of the head. The crown 

 and back of head and neck are light ashy brown like the back. 



A young bird just Jiaviug assumed tJie first plumage (P. U. O. C. 7788, 

 female, Punta Arenas, Straits of Magellan, Patagonia, A. E. Colburn) 

 presents the following character. 



Above the general color is ashy grey, each feather conspicuously fringed 

 and margined with sandy buff. The crown and upper neck like the back. 

 The white forehead and loral region indicated. Down still showing about 

 throat and head. Wings and tail much as in the adults, but the wing 

 coverts much marked with sandy buff on their margins and terminally. 



Below white, the two black bands being indicated by ashy brown bands, 

 which have all the feathers fringed with sandy buff. 



Geographical Range. — The Falkland Islands, Patagonia, Chili and 

 the Argentine Republic. 



The series of the rusty-crowned or Falkland plover collected by the 

 naturalists of the Princeton Expeditions is enumerated in detail below. 

 In the Falkland Islands this plover is a migrant, coming to that region 

 to breed and leaving for the mainland when the winter season is passed. 

 It arrives in the Falklands during September and breeds in October, 

 Abbott speaking of the species at that point. Gibson writes of this at 

 Cape San Antonio, Buenos Aires : "Common except at times of drought. 

 It affects the borders of marshes and lagoons and with the cinnamon- 

 colored patch at the back of its head and the black-barred breast, is a 

 very noticeable and handsome little bird. 



"The latter half of August and beginning of September constitute the 

 breeding season. Four nests which I have taken were situated close to 

 swamps and were only a hollow scraped in the ground and more or less 

 lined with dry grass. On one occasion the sitting bird remained at a 

 little distance watching me, but the other times it only left the nest when 



