GBEBES. 69 



BLACK-THEOATED DIVEE. Colymhus arcticus, Lin- 

 naeus. 



Resident in Scotland and the Hebrides, where it 

 breeds in limited numbers ; a winter visitant to 

 England and Ireland. 



EED-THEOATED DIVEE. Colymbus septentrionalis, 

 Linnaeus. 



Resident in Scotland and the Hebrides, where it 

 breeds ; a winter visitant to England and Ireland. It 

 may be observed that all three species of Diver occa- 

 sionally remain about their winter quarters long 

 enough to acquire the full breeding-plumage. 



Earn. PODICIPIDiE. 



GEEAT CEE8TED GEEBE. Podiceps cristatus (Lin- 

 naeus). 



A local resident, migrating southward in winter. 



EED-NECKED GEEBE. Podiceps ruhricolUs (Gmelin). 



A winter visitant, sometimes (though rarely) remain- 

 ing late enough in spring to display the complete 

 breeding-plumage. It is of rare occurrence in Ireland. 



8CLAV0NIAN GEEBE. Podiceps cornutus (Gmelin). 

 The same remarks apply as to the last named. 



