530 Ernst Hartert and Aunie C. Jackson : 



This form appears to agree in all essential characters with 

 C. alexandrinus, except in the complete absence of the black 

 loral line. We agree therefore -with Seebohm in treating it 

 as a subspecies o£ the latter. 



It inhabits the western United States of North America 

 and migrates far south into South America. 



iii. What is " ^Egialitts homeyeri'' Brehm? 

 In 1855, Vogelfang, p. 283, C. L. Brehm described 



A. homeijeri, saying that it had a long black beak, the size 

 oiA. hiaticula, the markings of A. dubius, hnt a greyish rust- 

 vellow crown. The description has not been quoted in Cat. 



B. Brit. Mus xxiv. p. 259, but only the nomen nudum in 

 the Naumannia, 1855, with a query. Examining the type 

 of ^. homeyeri, now in the Tring Museum, we find it is a 

 Charadrius hiaticula with the head of a C. alexandrinus 

 skilfully sown on. It is labelled as coming from the island 

 of RUgeu in the Baltic. 



iv. On Charadrius collaris. 



In looking over the series of this species in the Tring 

 Museum, we were struck by the different sizes of the various 

 specimens, and it became clear that all the northern ex- 

 amples, i. e., from Central America, Bonaire Island, Vene- 

 zuela, British Guiana, and the Rio Madeira in Brazil, formed 

 the small race, while those from southern Brazil to the 

 Argentine Republic were considerably larger. Therefore 

 the two races should be separated. 



The larger race was first named by Vieillot in 1817 from 

 Azara, who described it from Paraguay. C. azarce Temm. 

 is based on the same description and, therefore, a pure 

 svnonytri. C larvatus appears to be also a synonym, being 

 based on a specimen brought home by Delalande, who seems 

 to have collected in south-east Brazil only ; moreover, it is 

 said to be of the size of the Little Ringed Plover, Avhich 

 applies certainly better to the big race than the small one. 

 Tiie first description of the small form is that by Cabanis, 

 who in 1872 named it JEt/ialitis yrarilis. The northern 



