OF BRITISH BIRDS. d 



mucli doubt ouglit to cause the complete rejection of a species, or what 

 amount of evidence may justify its being admitted to the rank of a 

 supposed visitor ; but I have endeavoured to draw the line as fairly as 

 possible, and have included the following species in this doubtful class. 



Eleven of these are supposed to have visited our Islands from arctic or 

 subarctic America — 



Ceryle alcyon, 



Affelaiufs phceniceus, 



Sturnella magna, 



Scolecophagus ferrugineus, 



Progne purpurea, 



Elanoides furcatus, 



Faico sparverius, 



Cygnus americanus, 



Bernicla canadensis, 



Anas americana, 



Anas discors; 



five from Central or Southern Europe — 



Turnix sylvatica, 

 Phoenicopterus roseus, 

 Forphyrio cceruleus, 

 Pyrrhocorav alphius, 

 Fringilla serinus ; 



one from East Siberia — 



Emberiza cioides ; 



one from the Azores or Madeira — 



Fringilla canaria ; 



one from tropical India — ''^ 



Falco juggur ; 



one from tropical Africa — 



Porph^jrio smaragdonotus ; 



and one from tropical A)nerica — 



Porphyria martinicus. 



Introduced Species. 



In addition to the doubtful species Ave may exclude one or two other 

 species which have been artificially introduced from more or less distant 



